AJEET ROHATGI
School of Electrical and Computer Engineering
Georgia Institute of Technology
Atlanta, GA 30332-0250
Telephone: 404/894-7692
Facsimile: 404/853-9171
DATE OF BIRTH
December 3, 1950
U. S. Citizen
CURRENT TITLE
Regents Professor
Georgia Power Distinguished Professor of Electrical Engineering
Director, University Center of Excellence for Photovoltaics
Research and Education
EDUCATION
Ph.D. Metallurgy and Materials Science, Lehigh University
M.S. Materials Engineering, Virginia Polytechnic Institute
and State University
B.S. Electrical Engineering, Indian Institute of Technology,
Kanpur, India
1977
1973
1971
EMPLOYMENT HISTORY
Georgia Institute of Technology
Regents’ Professor
Director, University Center of Excellence for
Photovoltaic Research and Education
Georgia Power Distinguished Professor
Professor of Electrical Engineering
Associate Professor of Electrical Engineering
Westinghouse Research & Development Center, Pittsburgh, PA
Westinghouse Fellow
Senior Engineer A
Senior Engineer B
1
1995-present
1992-present
1988-present
1987-1988
1985-1987
1984-1985
1980-1984
1977-1980
EXPERIENCE SUMMARY
At Westinghouse: Science and technology of photovoltaic and devices; identification of
defects in semiconductors and their effects on electronic materials and devices; design and
fabrication of record high efficiency solar cells; low temperature and dry processing of VLSI
circuits; development of radiation hard field oxide and thin gate dielectrics for next generation
integrated circuits.
CURRENT FIELDS OF INTEREST
Modeling and fabrication of record high efficiency silicon solar cells; fundamental
understanding of defects and their passivation in multicrystalline materials; development of
low-cost high-performance devices; rapid thermal processing of silicon solar cells defects and
carrier lifetime limiting mechanisms in semiconductors; optical and electronic properties of
compound semiconductors; MBE and MOCVD growth of III-V and II-VI semiconductors; lowtemperature high-quality dielectrics; materials characterization and novel instrumentation
techniques.
PROFESSIONAL AFFILIATIONS
Fellow, Institute of Electrical and Electronics Engineers (IEEE)
Member, American Physical Society
Member, Solar Energy Society
Member, American Ceramic Society
Member, Electrochemical Society
Member, Materials Research Society
Member, Technical Advisory Committee for DOE Solar Energy Programs
Member, Solar Energy Research Institute Proposal Evaluation Panel
Member, Editorial Board, Solar Cell Journal
Member, Editorial Board, Solar Energy Materials and Solar Cells
Member, Board, GT Solar Inc.
Member, Editorial Board, Progress in Photovoltaics
2
HONORS AND AWARDS
1.
2.
3.
4.
5.
6.
7.
8.
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10.
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31.
32.
33.
Regents Professor 1995-present
Graduate Student Government Faculty of the Year Award, 1995
Sigma Xi Outstanding Sustained Research Award, 1994
DOE "University Center of Excellence Award" for sustained contributions to the science
and technology of photovoltaic, 1992
Georgia Power Distinguished Professor, 1987
IEEE Fellow for theoretical and experimental contributions to design and fabrication of high
efficiency solar cells, 1991
Westinghouse Fellow, 1985
Westinghouse Engineering Achievement Award in recognition of achievement in design,
development and fabrication of high efficiency silicon solar cells, 1984
DOE Research Excellence Award for Outstanding Crystalline Silicon PV Devices and
Processing, 1995
DOE Research Excellence Award for Outstanding Analysis, Characterization, and Device
Fabrication of Thin-Film Cadmium Telluride, 1995
NASA Recognition Certificate, for development of coatings to boost solar-cell output, 1987
NASA Recognition Certificate for technical innovation of high efficiency solar cell designs
using doped polysilicon layers, 1986
NASA Recognition Certificate for creative development of contact system for
semiconductor devices, 1981
Invited Technical Expert to Hong Kong University of Science and Technology, 1991
Technical Expert, United Nations Development Program (UNDP), 1981
Sigma Xi Best Doctoral Dissertation Advisor Award, 1992
Best Poster Paper Award, 23rd IEEE Photovoltaic Specialists Conference, 1993
Science Applications International Corporation (SAIC) Outstanding Paper Award, 1991
SAIC Outstanding Research Paper Award, as Faculty Advisor, 1992
Horner Fellowship, 1975-1977
National Science Foundation Research Scholarship, 1973-1975
Best Bachelor of Technology Undergraduate Research Project Award, 1971
National Merit Scholarship, 1964-1971
Honorary Adviser of Beijing Solar Energy Research Institute, 1995
Best Poster Paper Award, 25th IEEE Photovoltaic Specialists Conference, 1996
Georgia Institute of Technology Distinguished Professor Award, 1996
Georgia Tech Commencement Speaker, September 1996.
Sigmi Xi Best Doctoral Dissertation Advisor Award, 1998.
Science Applications International Corporation, Best Paper Award, April 1998.
Electrochemical Society, Thomas D. Callinan Award, 1999.
11th International Phovoltaic Science and Engineering Conference, Special Paper Award,
1999.
Best Poster Paper Award, 28th IEEE Photovoltaic Specialists Conference, 2000.
General Chair, IEEE Photovoltaic Specialists Conference, 2000.
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34.
35.
36.
37.
38.
39.
40.
41.
42.
43.
44.
IEEE Power Engineering Society Energy Development and Power Generation Committee,
Technical Committee Prize Paper Award, 2000.
Best Poster Paper Award, 29th IEEE Photovoltaic Specialists Conference, 2002.
President’s Council Outstanding Faculty/Staff Advisor Award, 2003.
IEEE William Cherry Award, Third World Conference WCPEC, May, 2003.
Best Paper Award, 3rd WCPEC World Conference on PV Energy Conversion, May, 2003
National Renewable Energy Lab, Paul Rappoport Award, December 2003.
SAIC Outstanding Research Paper Award, April 2004.
Sigma Xi Best Thesis Award, April 2004.
Best Papr Awards, 14th International PVSEC, January 2004.
Best Poster Paper Award, 31st Photovoltaic Specialists Conference, January 2005.
GA Tech Outstanding Research Program Development Award 2007
TEACHING
Courses Taught
Number of
Students
Quarter
Course
Fall 1985
Winter 1986
Spring 1986
Fall 1986
Spring 1987
Fall 1987
Spring 1988
Fall 1988
Spring 1989
Fall 1990
Spring 1990
Spring 1991
Fall 1992
Spring 1993
Fall 1993
Fall 1994
Fall 1995
Fall 1996
Fall 1997
Fall 1998
Fall 1999
EE 4350, Materials Science
EE 4350, Materials Science
EE 4350, Materials Science
EE 8345, Solar Cells
EE 4056, IC Fabrication
EE 8344, Solar Cells
EE 4056, IC Fabrication
EE 8344, Solar Cells
EE 4056, IC Fabrication
EE 6456, Solar Cells
EE 4056, IC Fabrication
EE 4056, IC Fabrication
EE 6456, Solar Cells
EE 4056, IC Fabrication
EE 6456, Solar Cells
EE 6456, Solar Cells
EE 6456, Solar Cells
EE 6456, Solar Cells
EE 6456, Solar Cells
EE 6456, Solar Cells
EE 6456, Solar Cells
4
42
45
48
21
15
19
23
17
25
25
12
14
21
15
22
14
14
18
23
20
11
Instructor
Value Rating*
(5.0 basis)
3.8
4.4
3.9
4.8
4.9
4.7
4.4
4.6
4.7
4.3
4.6
4.9
4.7
4.6
4.6
4.7
4.6
4.8
4.8
4.6
4.8
Fall 2000
Spring 2001
Spring 2002
Fall 2003
Fall 2004
EE 6456, Solar Cells
EE 4752 IC Fabrication
EE 6453, Theory of Electronic Devices
EE 6456, Solar Cells
EE 6456, Solar Cells
09
29
33
23
17
4.3
4.6
4.5
4.3
4.6
*Instructor's overall ability and effectiveness as a teacher obtained from Institute student course
evaluations.
Curriculum/Laboratory Development
1.
2.
3.
4.
5.
6.
7.
8.
Developed a new graduate level course on solar cells, EE 6456, 1986.
Assisted in the development of undergraduate level course on IC fabrication (EE 4056) and
tour of the silicon fabrication laboratory.
Started a new laboratory special problems course on design and fabrication of high
efficiency silicon solar cells, 1994.
Established a research laboratory for electrical characterization of semiconductors, 1988.
Established a research laboratory for optical characterization of semiconductors, 1989.
Established a complete state-of-the-art silicon solar cell fabrication facility, 1990.
Established University Center of Excellence for Photovoltaics Research and Education,
1992.
Established DOE-sponsored Educational Support Program (ESP) laboratory to assist U.S.
University Research Programs on Photovoltaics, 1993.
Individual Student Guidance
Research Engineers/Post Doctoral Fellows Supervised
a.
R. Sudharsanan, 1988-91
Currently at Spire Corporation,
Boston, MA. MOCVD growth and
optoelectronic properties of CdTe films.
b.
R. R. King, 1990-91
Currently at Siemens Solar
Corporation, Camarillo, CA.
Aluminum diffusion and fabrication of
high efficiency silicon solar cells.
c.
J. Salami, 1990-1994
Currently at Ebara Solar, Large, PA.
Fabrication of high efficiency poly and
single crystal silicon cells.
d.
A. Bhat, 1991-1995
Currently at Siemens Advanced
5
Technology Center, Alpharetta, GA.
CdTe thin film solar cells by MOCVD.
e.
Z. Chen, 1992-1995
Currently at Hewlet-Packard
Company, Corvallis, OR. PECVD
coatings, and rapid thermal processing
of silicon cells.
f.
G. Crotty, 1992-1996
Currently at SunPower Corporation,
Sunnyvale, CA. Silicon solar cells
fabrication and operation of the
Education Support Program laboratory.
g.
S. Kamra, 1992-2000
Currently at
Solution growth of CdS thin films for
CdTe/CdS heterojunction solar cells.
h.
K. Tate,
Currently at Georgia Institute of
Technology (UCEP). Semiconductor
characterization and instrumentation.
j.
J. Mejia, 1995-1997
Currently at ITT Nightvision,
Roanoke, VA. Silicon solar cells
fabrication
k.
P. Doshi, 1997-1999
Currently at Hewlett Packard. High
Efficiency RTP Solar Cells.
l.
A. Ebong, 1997-present
Currently an Associate Director of
UCEP at the Georgia Institute of
Technology, (UCEP). High Efficiency
Large Area Low Cost Solar cells.
1992-1997
Ph.D. Students Supervised
a.
R. L. Frost
(graduated Fall 1990). Currently at
Savannah River Nuclear Plant,
Savannah, GA.
"Slow Positron Annihilation
Spectroscopy Applied to the Analysis of
Thin Semiconductor, Silicide and
Titanium Nitride Structures"
Thesis Title:
6
b.
S. A. Ringel
(graduated Spring 1991). Currently a
faculty member, Ohio State
University.
"Growth and Process Induced Defects
and Recombination Mechanisms in
AlGaAs/GaAs and Cd1-xZnx Te/CdS
Photovoltaic Device Structures"
Thesis Title:
c.
B. Wagner
(academic advisor, graduated Fall
1991). Currently a Research
Engineer, Georgia Tech Research
Institute.
"Molecular Beam Epitaxial Growth of
CdTe and HgCdTe for New Infrared
and Optoelectronic Devices"
Thesis Title:
d.
A. W. Smith
(graduated Spring 1992). Currently a
Member of the Senior Technical
Staff, ITT Night Vision
"Light Confinement and Hydrodynamic
Modelling of Semiconductor Structures
by Volumetric Methods"
Thesis Title:
e.
R. Ramanachalam
(graduated Spring 1993). Currently a
Process Engineer, Texas Instruments,
Dallas, TX.
"Correlation of Defects and Electronic
Properties of Si and ZnO"
Thesis Title:
f.
G. Augustine
(graduated Fall 1993). Currently a
Senior Engineer at Westinghouse
Science and Technical Center,
Pittsburgh, PA.
"Modelling, Characterization and
Fabrication of InP Thin Films and
Devices for Optoelectronic
Applications"
Thesis Title:
g.
S. K. Pang
(graduated Fall 1993). Currently a
member of the Technical Staff at the
Institute of Microelectronics,
National University of Singapore.
7
h.
Thesis Title:
"Defects and Carrier Lifetime in
Silicon"
P. Sana
(graduated Spring 1995) Intel
Corporation, Portland, OR.
Currently a Process Development
Engineer at Texas Instruments,
Dallas, TX.
"Fabrication and Analysis of High
Efficiency Polycrystalline Silicon Solar
Cells"
Thesis Title:
i.
W. A. Doolittle
(graduated Fall 1995) Currently an
Associate Professor with the School
of Electrical and Computer
Engineering, Georgia Tech
"Deep Level Transient Spectroscopy
and Defects in Polycrystalline Silicon"
Thesis Title:
j.
H. C. Chou
(graduated Summer 1995) Currently a
Manufacturing Development
Engineer with Hewlett-Packard,
Santa Rosa, CA.
"Defects and Carrier Transport
Mechanisms in Polycrystalline
CdTe/Cds Heterojunction Solar Cells"
Thesis Title:
k.
L. Cai
(graduated Spring 1996) Currently a
Research Engineer with SpectroLab,
Los Angeles, CA.
"High Efficiency Inversion Layer
Silicon Solar Cells"
Thesis Title:
l.
P. Doshi
(graduated Winter 1997) Currently at
Hewlett Packard, Atlanta, GA
"Rapid Thermal Processing of High
Efficiency Silicon Solar Cells"
Thesis Title:
m.
T. Krygowski
(graduated Spring 1998) Currently a
Research Engineer with Sandia
National Laboratories, Albuquerue,
New Mexico
8
n.
Thesis Title:
"Gettering and Passivation of High
Efficiency Silicon Solar Cells"
S. Narasimha
(graduated Winter 1999) Currently
Research Engineer with IBMCorporation-East Fishkill, Hopewell
Junction, NY
"Understanding and application of
screen-printed metallization, aluminum
back surface fields, and dielectric
surface passivation for high-efficiency
silicon solar cells"
Thesis Title:
o.
M. Ropp
(graduated Fall 1998) Currently an
Associate Professor, South Dakota
State University, Brookings, South
Dakota
"Design issues for grid-connected
photovoltaic systems"
Thesis Title:
p.
A. Ristow
Thesis Title:
(expected date of graduation Fall 2004)
“High Efficiency Multicrystalline
Silicon Solar Cells”
q.
V. Yelundur
(graduated Fall 2003) Currently a
Research Engineer II, UCEP,
Georgia Institute of Technology
“Understanding and implementation of
hydrogen passivation of defects in
String Ribbon silicon for highefficiency, manufacturable, silicon solar
cells”
Thesis Title:
r.
M. Finnegan
Currently a graduate student at the
University of Michigan
“Development of Low Cost on
Dendritic Web Silicon”
Thesis Title:
s.
B. Damiani
(graduated Fall 2003) Currently a
Research Scientist at Intel, Portland
Oregon
“Investigation of light induced
Thesis Title:
9
degradation in promising photovoltaic
grade silicon and development of
porous silicon anti-reflection coatings
for silicon solar cells”
t.
J. Jeong
(graduated Fall 2002) Currently a
Research Scientist at LG Chemical
Ltd. In Daejun, Korea
“Hydrogen passivation of defects and
rapid thermal processing for highefficiency silicon ribbon solar cells”
Thesis Title:
u.
A. Pregelj
(graduated Spring 2004) Currently a
Transmission Planning Engineer at
Georgia Transmission Corporation
“Impact of distributed generation of
power network operation”
Thesis Title:
v.
J. Brody
(graduated Fall 2003) Currently a
Lecturer at Emory University,
Atlanta, Georgia
“Doping Dependence of Surface and
Bulk Passivation of Multicrystalline
Silicon Solar Cells”
Thesis Title:
w.
K. Nakayashiki
(graduated Fall 2007) Currently a
Reseach Engineer at Palo Alto
Research Center, Palo Alto, CA
“Understanding of defect passivation
and its effect on multicrystalline silicon
solar cell performance”
Thesis Title:
x.
V. Meemongkoliat
Thesis Title:
(expected date of graduation Fall 2008)
Development of High Efficiency
Czochralski Silicon Cells Through
Understanding and Improvement of
Light Induced Degradation
y.
M. Sheoran
Thesis Title:
(expected date of graduation, Fall 2009)
Development of Thin High Efficiency
Cast Multicrystalline Si Cells
z.
Gregory Henry
(expected date of graduation, Fall 2009)
10
Thesis Title:
a.
M. Hilali
(graduated, Summer 2005) Currently
a Research Engineer at Advent Solar,
Albuquerque, New Mexico
“Understanding and Development of
Manufacturable Screen Printed
Contacts on High Sheet Resistance
Emitters for Low-Cost Si Solar Cells
Thesis Title:
b.
Sumit Pahwa
(Currently a graduate student in
India)
“Development of Interdigitalied Back
Contact Si Solar Cells”
Thesis Title:
c.
Arnab Das
Theis Title:
(expected date of graduation, Fall 2011)
d.
Rishi Ramanathan
Thesis Title:
(expected date of graduation, Fall 2010)
M. S. Students Supervised
a.
b.
J. Ward
(graduated Spring 1988) Currently a
Research Engineer for AT&T,
Jacksonsville, FL
Research Topic:
“Fourier Transform Infrared
Spectroscopy of Semiconductors”
J. Salami
(graduated Spring 1990) Currently a
Process Engineer with Ebara Solar,
Large, PA
“Silicon Solar Cells and Power
Devices”
Research Topic:
c.
K. C. Lee
Research Topic:
(graduated Fall 1990)
“Fabrication of High Efficiency Silicon
Cells”
11
d.
M. McDougal
Research Topic:
(graduated Spring 1991)
“CdTe Solar Cells”
e.
T. Pham
Research Topic:
(graduated Spring 1994)
“Optimum Junction and Contact
Formation for High Efficiency Silicon
Solar Cells”
Undergraduate Students Supervised
a.
Michael Haight
FTIR Measurements
b.
Jim Welch
I-V Measurements and Solar Cell
Testing
c.
Tuan Pham
Solar Cell Processing
d.
Mahmudul Bari
Photovoltaic Lighting System
e.
Maksura Haque
PV for residential application
f.
g.
Catherine Sana
Jose Mejia
Mechanical texturing of silicon wafers
Fabrication of high efficiency solar cells
Visiting Scholars
a.
b.
Kiyoshi Yasutake
Professor, Precision Engineering,
Osaka University, Japan
Research Topic:
“Modelling and Growth of PECVD
Oxides”
Cor Leguijt
Netherlands Energy Research
Foundation ECN
“Surface Passivation by PECVD Oxides
and Nitrides”
Research Topic:
c.
Jens Moschner
Ph.D Student, Institut fur
Solarenergieforschung GmbH,
Germany
“Surface Passivation of Silicon Solar
Research Topic:
12
Cells”
4.
Ralf Ludeman, Ph.D.
Fraunhofer Institute for Solar Energy
Systems, Germany
“Porous Silicon Texturing of Si
Solar Cells
Research Topic:
Graduate and Undergraduate Special Problem Students
Supervised more than 20 students in the areas of modelling, design, fabrication, circuits and
instrumentation.
RESEARCH PROPOSALS AND GRANTS FUNDED (as PI unless otherwise noted)
Georgia Tech
1.
Basic Understanding of Lifetime Limiting Mechanisms in Silicon
Sponsor: Electric Power Research Institute
$108,000, January - December, 1986
2.
A Team Approach to Very High Efficiency Silicon Solar Cells
Sponsor: Electric Power Research Institute
$53,852, October 1986 to Sept. 1987.
3.
High Efficiency Cadmium and Zinc Telluride Based Thin Film Solar Cells
Sponsor: SERI/DOE
$450,000, July 1986 to Nov. 1988.
4.
New Concepts for Heterojunction Solar Cells
Joint Proposal with C. J. Summers (Co-Principal Investigator)
Sponsor: SERI/DOE
$100,000, June 1987 to May 1988.
5.
GaAs Solar Cell Research
Sponsor: Sandia National Labs
$32,000, Oct. 1986 to Sept. 1987.
6.
Basic Research on Advanced Silicon Materials for High Performance Photovoltaic and
Power Devices
Sponsor: Electric Power Research Institute (EPRI)
$600,442, October 1986 to September 1989.
13
7.
Investigation of High Efficiency Solar Cells
Sponsor: Sandia National Labs
$90,000, Jan. to Dec. 1988.
8.
Silicon Materials Research
Sponsor: SERI/DOE
$25,000, October 1988 to September 1989.
9.
Research on High Efficiency Silicon Solar Cells
Sponsor: DOE/Sandia National Labs
$99,000, May 1989 to April 1990.
10.
Silicon Materials Research
Sponsor: SERI/DOE
$25,000, October 1980 to September 1990.
11.
Development of High Efficiency CdTe and CdZnTe Solar Cells
Sponsor: DOE/SERI
$450,000, September 1989 to August 1992.
12.
Basic Research on Advanced Silicon Materials for High Performance Photovoltaic Devices
Sponsor: Electric Power Research Institute (EPRI)
$170,500, January 1990 to December 1990.
13.
Development of High Efficiency CdTe and CdZnTe Solar Cells
Sponsor: SERI/DOE
$150,004, January 1990 to January 1991.
14.
Investigation and Fabrication of High Efficiency Silicon Solar Cells
Sponsor: DOE/Sandia National Labs
$99,000, August 1989 to June 1990.
15.
Investigation of High Efficiency Silicon Solar Cells
Sponsor: DOE/Sandia National Labs
$183,367, June 1990 to May 1991.
16.
Impurity Characterization Support for Crystalline Silicon Program
Sponsor: SERI/DOE
$128,000, October 1989 to February 1992.
17.
High Efficiency CdTe Solar Cells
Sponsor: SERI/DOE
$410,250, January 1992 to January 1995.
14
18.
Low Cost Technologies for Micromechanical Systems
Sponsor: NSF. Joint proposal with M. Allen and N.M. Jokerst (Co-Principal Investigators).
$503,695, September 1991 to August 1994.
19.
Development of Low-Cost High Efficiency Silicon Solar Cells
Sponsor: Sandia National Labs/DOE
$170,000, December 1991 to June 1993.
20.
Fundamental Research on Post-Growth Quality Enhancement Techniques in Crystalline
Silicon Materials
Sponsor: NREL/DOE
$398,588, April 1992 to June 1995.
21.
University Center of Excellence in Photovoltaics for Research & Education
Sponsor: Sandia National Labs/DOE and Georgia Institute of Technology
$2,168,594, June 1992 to July 1995.
22.
The Design, Construction and Monitoring of a Photovoltaic Power System on the Georgia
Tech Aquatic Center, Site of the 1996 Olympic Natation Venue (as co-principal
investigator)
Sponsor: Department of Energy, Georgia Power Company and Georgia Institute of
Technology
$5,439,000, March 1994 to December 1996.
23.
University Center of Excellence in Photovoltaics for Research & Education
Sponsor: Sandia National Labs/DOE and Georgia Institute of Technology
$3,655, 098, July 1995 to June 2000.
24.
Fundamental Research on Post-Growth Quality Enhancement Techniques in Crystalline
Silicon Materials
Sponsor: NREL/DOE
$73,900, May 1995 to October 1995
25.
High Efficiency CdTe Solar Cells
Sponsor: NREL/DOE
$25,000, January 1995 to October 1995
26.
Development of Rapid Thermal Processing to Produce Low Cost Solar Cells
Sponsor: Solarex Corporation
$295, 934, July 1995 to June 1998
27.
Defect Characteristics and Process Development for HCL Efficiency Thin Silicon Film
15
Solar Cell
Sponsor: AstroPower
$137, 500, July 1995 to June 1998
28.
Characterization of Defects and Minority Carrier Lifetime in Silicon Carbide Materials
Sponsor: Space Power Institute
$135,000, July 1995 to June 1998
29.
Fundamental Research on Post-Growth Quality Enhancement Techniques in Crystalline
Silicon Materials
Sponsor: NREL/DOE
$595,488, April 1992 to July 1997.
30.
University R&D in Crystalline Silicon
Sponsor: NREL/DOE
$443,000, January 1998 to December 2000.
31.
Module Integrated Charge Controller
Sponsor: Advanced Energy Systems
$40,000, July 1997 to June 1998.
32.
Ultra Thin Silicon Ribbon for High Efficiency Solar Cells
Sponsor: Evergreen Solar
$175,082, October 1997 to September 2000.
33.
The Aquatic Center Roof PV Systems
Sponsor: Georgia Institute of Technology
$25,000, October 1997 to September 1998
34.
Process Development for Dendritic Web Silicon Solar Cells
Sponsor: Ebara Solar Incorporated
$250,000, February 1998 to December 1999
35.
Post Deposition Processes and Devices
Sponsor: MV Systems Inc.
$25,000 April 1998 to October 1998
36.
Rapid Thermal Processing of EFG Silicon for Solar Cell Manufacturing
Sponsor: ASE Americas, Inc.
$204,913, August 1998 to August 2001
37.
Novel Processes for Ribbon Silicon Solar Cells
Sponsor: Evergreen Solar Inc.
16
$210,000, (2001-2004)
38.
Development of High Efficiency Solar Cells on HEM Multicrystalline Silicon
Sponsor: GT Solar Technologies Inc.
$42,400 (2001-2004)
39.
University Photovoltaic Research Education and Collaboration with the US Department of
Energy
Sponsor: United States Department of Energy
$4,250,874, July 2000 - June 2005
40.
Sandia Lab and Equipment Grant
Sponsor: Sandia National Labs
$309,000 March 2001
41.
University Research in Crystalline Silicon Photovoltaics
Sponsor: National Renewable Energy Lab
$450,000 January 2002 – March 2005
42.
Development of Manufacturable High Efficiency Czochralski Silicon Solar Cells
Sponsor: Shell Solar Industries LP
$155,853 May 2003-2005
43.
Investigation of New Screen Printed Pastes for Low-Cost High Efficiency Silicon Solar
Cells
Sponsor: Ferro Corporation
$135,000, September 2003-August 2005
44.
Development of High Efficiency String Ribbon Cells
Sponsor: Evergreen Solar Inc.
$80,000 May 2003-2005
45.
Understanding, Modeling and Efficiency Enhancement of Spheral Solar Cells
Sponsor: Spheral Solar Power
$100,000, January 2005-2006
46.
Development of Amorphous Crystalline Hybrid (ACH) Silicon Solar Cells
Sponsor: General Electric
$140,000, January 2005-January 2007
47.
Application of A Boron Source Diffusion Barrier for the Fabrication of Back Contact Silicon
Solar Cells
Sponsor: Advent Solar
17
$87, 558.00, November 2003-October 2004
48.
Development of Contacts for Back-Contact Emitter-Wrapped Through Silicon
Sponsor: Advent Solar
$100,000.00, January 2005-December 2005
49.
Thin-Film Si Bottom Cells for Tandem Device Structures
Sponsor: NREL/UOD
$535,079.00, December 2003-December 2007
50.
Fabrication and Characterization of High-Efficiency Solar Cells on Multicrystalline Silicon
Substrates
Sponsor: BP Solar
$40,000.00, August 2005-December 2005
51.
Development of Manufacturable High Efficiency Czochralski Silicon Solar Cells
Sponsor: Shell Solar Industries LP
$74,331.00 May 2005-2006
52.
Investigation of New Screen Printed Pastes for Low-Cost High Efficiency Silicon Solar Cells
Sponsor: Ferro Corporation
$70,000, September 2005-September 2007
53.
Fabrication of High-Efficiency Solar Cells on Thin (100-150 m) Silicon Substrates
Sponsor: BP Solar
$120,000.00, December 2004-December 2006
54.
University Research in Crystalline Silicon Photovoltaics
Sponsor: National Renewable Energy Lab
$101, 250, October 2005 – April 2005
55.
Investigation of New Screen-Printed Pastes from Hereaeus Inc. for High Efficiency
Sponsor: Heraeus Incorporated, Inc.
$80,000.00, December 2005-December 2006
56.
Investigation of New Screen-Printed Pastes for High Efficiency
Sponsor: Engelhard Corporation
$300,000.00, December 2005 –December 2007
Other Research Grants
In addition to being Principal Investigator on the above externally funded projects at Georgia
18
Tech, participated in several sponsored research programs as co-investigator at the
Westinghouse Research and Development Center during 1977 and 1985, and generated an
approximate funding of $5 million.
REFEREED JOURNAL PUBLICATIONS
1.
A. Rohatgi, T. R. Viverito, and L. H. Slack, "Electrical and Optical Properties of Tin Oxide
Films", Journal of American Ceramic Society, vol. 56, no. 6, pp. 278-279, June 1974.
2.
A. Rohatgi, T. R. Viverito, and L. H. Slack, "Materials for Efficient Reflection of Thermal
Energy: Doped Tin Oxide Films", Reviews on High Temperature Materials, vol. 3, no. 2, pp.
139-151, 1976.
3.
A. Rohatgi, S. R. Butler, F. J. Feigl, H. W. Kraner, and K. W. Jones, "Sodium Passivation in
Hcl Oxide Films on Si", Applied Physics Letters, vol. 30, no. 2, pp. 104-106, 1977.
4.
A. Rohatgi, S. R. Butler, F. J. Feigl, H. W. Kraner, and R. W. Jones, "Chlorine Incorporation
in Hcl Oxides", Journal of Electrochemical Society, vol. 126, no. 1, pp. 143-149, 1979.
5.
A. Rohatgi, S. R. Butler, and F. J. Feigl, "Mobile Sodium Ion Passivation in Hcl Oxides",
Journal of Electrochemical Society, vol. 126, no. 1, pp. 149-154, 1979.
6.
J. W. Chen, A. G. Milnes, and A. Rohatgi, "Titanium in Silicon as a Deep Level Impurity",
Journal of Solid State Electronics, vol. 22, no. 9-D, pp. 801-808, 1979.
7.
A. Rohatgi, "Application of DLTS Technique to Study Junctions and Interfaces",
Vacuum-Surfaces-Thin Films, K. L. Chopra and T. C. Goel (eds.), Vanity Books, pp.
115-133, 1979.
8.
A. Rohatgi, J. R. Davis, R. H. Hopkins, P. Rai-Choudhury, P. G. McMullin, and J.R.
McCormick, "Effect of Titanium Copper and Iron on Silicon Solar Cells", Journal of Solid
State Electronics, vol. 23, pp. 415-422, 1980.
9.
A. Rohatgi and P. Rai-Choudhury, "Process Induced Effects on Lifetime and Defects in
Float-Zone Silicon", Journal of Electrochemical Society, vol. 127, no. 5, pp. 1136-1139,
1980.
10.
R. B. Campbell and A. Rohatgi, "Investigation of Contact Systems for Silicon Solar Cells",
Journal of Electrochemical Society, vol. 127, no. 12, pp. 2702-2704, 1980.
11.
J. R. Davis, A. Rohatgi, R. H. Hopkins, P. Rai-Choudhury, J. R. McCormick, and P.D.
Blais, "Impurities in Silicon Solar Cells," IEEE Transactions on Electron Devices, vol.
19
ED-27, no. 4, pp. 677-687, 1980.
12.
A. Rohatgi, R. H. Hopkins, J. R. Davis, R. B. Campbell, H. C. Mollenkopf, and J.R.
McCormick, "The Impact of Molybdenum on Silicon and Silicon Solar Cell Performance",
Journal of Solid State Electronics, vol. 23, pp. 1185-1190, 1980.
13.
A. Rohatgi, R. H. Hopkins, and J. R. Davis, "The Properties of Polycrystalline Silicon Solar
Cells with Controlled Titanium Additions", IEEE Transactions on Electron Devices, vol.
ED-28, no. 1, pp. 103-108, 1981.
14.
K. W. Loh, D. K. Schroder, R. C. Clarke, A. Rohatgi, and G. W. Eldridge, "Low Leakage
Current GaAs Diodes", IEEE Transactions on Electron Devices, vol. ED-28, no. 7, pp.
796-800, 1981.
15.
L. B. Ta, H. M. Hobgood, A. Rohatgi, and R. N. Thomas, "Effects of Stoichiometry on
Thermal Stability of Undoped Semi-Insulating GaAs", Journal of Applied Physics, vol. 53,
no. 8, pp. 5771-5775, 1982.
16.
A. Rohatgi, J. R. Davis, R. H. Hopkins, and P. G. McMullin, "A Study of Grown-In
Impurities in Silicon by DLTS", Journal of Solid State Electronics, vol. 26, no. 11, pp.
1039-1049, 1983.
17.
A. Rohatgi and P. Rai-Choudhury, "Defects and Carrier Lifetime in Silicon", Silicon
Processing ASTM STP 804, D. C. Gupta (ed.), American Society of Testing and Materials,
pp. 389-404, 1983.
18.
A. Rohatgi and E. F. Federmann, "Importance and Consideration of High Efficiency Solar
Cells", Solar Cells, vol. 12, pp. 177-183, 1984.
19.
A. Rohatgi and P. Rai-Choudhury, "Design, Fabrication, and Analysis of 17-18% Efficient
Surface Passivated Silicon Solar Cells", IEEE Transactions on Electron Devices, vol.
ED-31, no. 5, pp. 596-601, 1984.
20.
R. Singh, S. J. Fonash, A. Rohatgi, P. Rai-Choudhury, and J. Gigante, "A Low Temperature
Process for Annealing Extremely Shallow As+ Implanted n+/p Junctions", Journal of
Applied Physics, vol. 55, no. 4, pp. 867-870, 1984.
21.
S. J. Fonash, R. Singh, A. Rohatgi, P. Rai-Choudhury, P. J. Caplan, and E. H. Pointdexter,
"Silicon Damage Caused by CCl4 Reactive Ion Etching: Its Characterization and Removal
by Rapid Thermal Annealing, Journal of Applied Physics, vol. 58, no. 2, pp. 862-866, 1985.
22.
X. C. Mu, S. J. Fonash, B. Y. Yang, K. Vedam, A. Rohatgi, and J. Riger, "Ar Ion Beam and
CCl4 Reactive Ion Etching: A Comparison of Etching Damage and of Damage
20
Passivation by Hydrogen", Journal of Applied Physics, vol. 58, no. 11, pp. 4282-4291, 1985.
23.
A. Rohatgi, "High Efficiency Silicon Solar Cells - Opportunity and Challenge", Proceedings
of the SPIE Critical Reviews of Technology Series-Photovoltaics, vol. 543, pp. 20-27, April
1985.
24.
A. Rohatgi, "Review of High Efficiency Solar Cells", Proceedings of SPIE - Photovoltaics
for Commercial Solar Power Applications, vol. 706, pp. 15-21, 1986.
25.
A. Rohatgi, P. Rai-Choudhury, S. J. Fonash, P. Lester, R. Singh, P. J. Caplan, and E. H.
Pointdexter, "Characterization and Control of Silicon Surface Modification Produced by CCl4
Reactive Ion Etching", Journal of Electrochemical Society, vol. 133, no. 2, pp. 408-416,
1986.
26.
A. Rohatgi and P. Rai-Choudhury, "Approach Toward 20% Efficient Solar Cells", IEEE
Transactions on Electron Devices, vol. ED-33, no. 1, pp. 1-7, 1986.
27.
X. C. Mu, S. J. Fonash, A. Rohatgi, and J. Riger, "Comparison of the Damage and
Contamination Produced by CF4 and CF4/H2 Reactive Ion Etching", Applied Physics Letters,
vol. 48, no. 17, pp. 1147-1149, April 1986.
28.
R. Sinharoy, R. A. Hoffman, A. Rohatgi, R. F. C. Farrow, and J. H. Riger, "Epitaxial Growth
of LaF3 on GaAs (111)", Journal of Applied Physics, vol. 59, no. 1, pp. 273-275, 1986.
29.
A. Rohatgi, D. L. Meier, P. Rai-Choudhury, S. J. Fonash, and R. Singh, "Effect of
Low-Energy Hydrogen Ion Implantation on Dendritic Web Silicon Solar Cells", Journal of
Applied Physics, vol. 59, pp. 4167-4171, June 1986.
30.
R. H. Hopkins and A. Rohatgi, "Impurity Effects in Silicon for High Efficiency Solar Cells",
Journal of Crystal Growth, vol. 75, pp. 67-79, 1986.
31.
A. Rohatgi and P. Rai-Choudhury, "High Efficiency Silicon Solar Cells: Development,
Current Issues, and Future Directions", Solar Cells, vol. 17, pp. 119-133, 1986.
32.
R. Singh, S. J. Fonash, and A. Rohatgi, "Interaction of Low-Energy Implanted Atomic H
with Slow and Fast Diffusing Metallic Impurities in Si", Applied Physics Letters, vol. 49,
no. 13.9, pp. 800-802, 1986.
33.
S. J. Fonash and A. Rohatgi, "RIE Damage and Its Control in Silicon Processing", Emerging
Semiconductor Technology, (D. C. Gupta and P. H. Langer, eds.), American Society for
Testing and Materials, ASTM STP 960, pp. 163-172, 1986.
34.
A. Rohatgi, S. K. Pang, T. K. Gupta, and W. D. Straub, "The Deep Level Transient
21
Spectroscopy Studies of ZnO Varistor as a Function of Annealing", Journal of Applied
Physics, vol. 63, pp. 5375-5379, 1988.
35.
A. Rohatgi, S. A. Ringel, J. Welch, E. Meeks, K. Pollard, A. Erbil, C. J. Summers, P. V.
Meyers, and C. H. Liu, "Growth and Characterization of Polycrystalline CdMnTe and
CdZnTe Thin Films for Solar Cells", Solar Cells, vol. 24, pp. 185-194, 1988.
36.
R. K. Dawless, R. L. Troup, D. L. Meier, and A. Rohatgi, "Production of Extreme Purity
Aluminum and Silicon by Fractional Crystallization Processing", Journal of Crystal Growth,
vol. 89, pp. 68-74, 1988.
37.
A. B. Dewald, Jr., R. L. Frost, S. A. Ringel, J. P. Schaffer, and A. Rohatgi, "Positron
Annihilation Spectroscopy of AlGaAs/GaAs Interfaces in MOCVD-Grown GaAs
Heterojunction Solar Cells", Journal of Vacuum Science and Technology, vol. A6, pp.
2248-2252, 1988.
38.
R. L. Frost, A. B. Dewald, Jr., J. P. Schaffer, A. Rohatgi, B. Nielson, and K. G. Lynn, "Slow
Positron Annihilation Spectroscopy of Hetero and Homo Junctions of GaAs Based
Semiconductor Thin Films", Thin Solid Films, vol. 166, pp. 349-357, 1988.
39.
Z. C. Feng, R. Sudharsanan, S. Perkowitz, A. Erbil, K. T. Pollard, and A. Rohatgi, "Raman
Scattering Characterization of High-Quality CdMnTe Films Grown by
Metalorganic Chemical Vapor Deposition", Journal of Applied Physics, vol. 64, pp.
6861-6863, 1988.
40.
T. F. Ciszek, T. Wang, T. Schuyler, and A. Rohatgi, "Some Effects of Crystal Growth
Parameters on Minority Carrier Lifetime in Float-Zoned Silicon", Journal of
Electrochemical Society, vol. 136, no. 1, pp. 230-234, 1989.
41.
Z. C. Feng, S. Perkowitz, R. Sudharsanan, A. Erbil, K. T. Pollard, and A. Rohatgi,
"Photoluminescence of CdMnTe Films Grown by Metalorganic Chemical Vapor
Deposition", Journal of Applied Physics, vol. 66, pp. 1711-1716, 1989.
42.
S. A. Ringel, A. Rohatgi, and S. P. Tobin, "An Approach Toward 25% Efficient GaAs
Heteroface Solar Cells", IEEE Transactions on Electron Devices, vol. 36, no. 7, pp.
1230-1237, 1989.
43.
R. Sudharsanan, Z. C. Feng, S. Perkowitz, A. Rohatgi, K. T. Pollard, and A. Erbil,
"Characterization of MOCVD-Grown CdMnTe Films by Infrared Spectroscopy", Journal of
Electronic Materials, vol. 18, no. 3, pp. 453-455, 1989.
44.
A. Rohatgi, J. P. Schaffer, A. B. Dewald, and R. L. Frost, "Positron Annihilation
Spectroscopy: Applications to Si, ZnO, and Multilayer Semiconductor Structures", Journal
22
of Electronic Materials, vol. 18, pp. 721-728, 1989.
45.
T. K. Gupta, W. D. Straub, M. S. Ramanachalam, J. P. Schaffer, and A. Rohatgi, "Grain
Boundary Characterization of ZnO Varistors by Positron Annihilation Spectroscopy",
Journal of Applied Physics, vol. 66, no. 12, pp. 6132-6137, 1989.
46.
A. Rohatgi, S. A. Ringel, R. Sudharsanan, P. M. Meyers, C. Liu, and V. Ramanathan,
"Investigation of CdZnTe, CdMnTe, and CdTe Polycrystalline Films for Photovoltaic
Applications", Solar Cells, vol. 27, no. 1, pp. 219-230, 1989.
47.
S. A. Ringel, R. Sudharsanan, A. Rohatgi, M. S. Owens, and H. P. Gillis, "Effects of
Annealing and Surface Preparation on the Properties of MBE-Grown Polycrystalline
CdZnTe Films", Journal of Vacuum Science and Technology, vol. A8, no. 3, pp. 2012-2019,
May 1990.
48.
S. A. Ringel, R. Sudharsanan, A. Rohatgi, and W. B. Carter, "A Study of Polycrystalline
Cd(Zn,Mn)Te/CdS Films and Interfaces", Journal of Electronic Materials, vol. 19, no. 3, pp.
259-263, 1990.
49.
S. K. Pang, A. Rohatgi, B. L. Sopori, and G. Fiegl, "A Comparison of Minority-Carrier
Lifetime in As-Grown and Oxidized Float-Zone, Magnetic Czochralski Silicon, and
Czochralski Silicon", Journal of Electrochemical Society, vol. 137, no. 6, pp. 1977-1980,
June 1990.
50.
R. Sudharsanan and A. Rohatgi, "Investigation of Metalorganic Chemical Vapor Deposition
Grown CdTe/CdS Solar Cells", Solar Cells, vol. 31, pp. 143-150, 1991.
51.
A. Rohatgi, R. Sudharsanan, S. A. Ringel, and M. McDougal, "Growth and Process
Optimization of CdTe and CdZnTe Polycrystalline Films for High Efficiency Cells", Solar
Cells, vol. 30, pp. 109-122, 1991.
52.
S. K. Pang and A. Rohatgi, "Effect of Oxygen Concentration on Lifetime in Magnetic
Czochralski Silicon", Journal of Electrochemical Society, vol. 138, pp. 523-527, 1991.
53.
M. S. Ramanachalam, A. Rohatgi, J. P. Schaffer, and T. K. Gupta, "Characterization of ZnO
Varistor Degradation Using Lifetime Positron-Annihilation Spectroscopy", Journal of
Applied Physics, vol. 69, no. 12, pp. 8380-8386, June 1991.
54.
S. K. Pang and A. Rohatgi, "Record High Recombination Lifetime in Oxidized Magnetic
Czochralski Silicon", Applied Physics Letters, vol. 59, no. 2, pp. 196-197, July 1991.
55.
S. A. Ringel, A. W. Smith, M. H. McDougal, and A. Rohatgi, "Effects of CdCl2 on
Electronic Properties of Molecular Beam Epitaxially Grown CdTe/CdS Heterojunction Solar
23
Cells", Journal of Applied Physics, vol. 70, no. 2, pp. 881-889, July 1991.
56.
A. Rohatgi, J. P. Schaffer, G. Augustine, and M. S. Ramachalam, "A Review of Selected
Techniques for Characterizing Radiation Induced Defects in Solar Cells", Journal of Solar
Cells, vol. 3, no. 4, pp. 379-394, September 1991.
57.
S. A. Ringel and A. Rohatgi, "The Effects of Trap Induced Lifetime Variations on the
Design and Performance of High Efficiency GaAs Solar Cells", IEEE Transactions on
Electron Devices, vol. 38, no. 11, pp. 2401-2409, November 1991.
58.
A. W. Smith and A. Rohatgi, "Reevaluation of the Derivatives of the Half Order Fermi
Integrals", Journal of Applied Physics, vol. 73,no. 11, pp. 7030-7034, June 1993.
59.
A. W. Smith and A. Rohatgi, "Non Isothermal Extension of the Scharfetter-Gummel
Technique for Lot Carrier Transport in Heterostructure Simulations", IEEE Transactions on
Computer-Aided Design of Integrated Circuits and Systems, vol. 12, No. 10, pp. 1515-1513,
October 1993.
60.
A.W. Smith and A. Rohatgi, "A New Texturing for Producing High Efficiency Solar Cells
with No Antireflection Coatings", Solar Energy Materials and Solar Cells, vol. 29, pp.
51-65, 1993.
61.
A.W. Smith and A. Rohatgi, "Ray Tracing Analysis of the Inverted Pyramid Texturing
Geometry for High Efficiency Silicon Solar Cells, Solar Energy Materials and Solar Cells,
vol. 29, pp. 37-49, 1993.
62.
G. Augustine, N.M. Jokerst and A. Rohatgi, "Base Doping Optimization for Radiation Hard
Si, GaAs, and InP Solar Cells, IEEE Transactions on Electron Devices, vol. 39, no. 10, pp.
2395-2400, October 1992.
63.
G. Augustine, N.M. Jokerst, and A. Rohatgi, "Single-Crystal Thin Film InP: Fabrication and
Absorption Measurements," Applied Physics Letters, vol. 61, no. 12, pp. 1429-1431,
September 1992.
64.
A. Rohatgi, "A Study of Efficiency Limiting Defects in Polycrystalline CdTe/CdS Solar
Cells", International Journal of Solar Energy, vol. 12, pp. 37-49, 1992.
65.
A. Rohatgi, A. Bhat, and H.C. Chou, "An Improved Understanding of Efficiency Limiting
Defects in Polycrystalline CdTe/CdS Solar Cells", American Institute of Physics Conference
Proceedings #268. Photovoltaic Advanced Research and Development Project, R. Noufi
ed., pp. 243-249, October 1992.
66.
A. Rohatgi, P. Sana, Z. Chen, and J. Salami, "Approach Towards High Efficiency
24
Polycrystalline Silicon Solar Cells", American Institute of Physics Conference
Proceedings #268. Photovoltaic Advanced Research and Development Project, R. Noufi ed.,
pp. 413-420, October 1992.
67.
W.A. Doolittle and A. Rohatgi, "A Novel Computer Based Pseudo-Logarithmic
Capacitance/Conductance DLTS System Specifically Designed for Transient Analysis",
Reviews of Scientific Instruments, vol. 63, no. 12, pp. 5733-5741, December 1992.
68.
A. Rohatgi, E. R. Weber, and L.C. Kimberling, "Opportunities in Silicon Photovoltaics and
Defect Control in Photovoltaic Materials", Journal of Electronic Materials, vol. 22, no. 1,
pp. 65-72, 1993.
69.
P. Sana, J. Salami, and A. Rohatgi, "Fabrication and Analysis of High Efficiency
Polycrystalline Silicon Solar Cells", IEEE Transactions in Electron Devices, vol. 40, no. 8,
pp. 1461-1468, August 1993.
70.
Z. Chen, P. Sana, J. Salami, and A. Rohatgi, "A Novel and Effective PECVD SiO2/SiN
Antireflection Coating for Si Solar Cells," IEEE Transactions on Electron Devices, vol. 40,
no. 6, pp. 1161-1165, June 1993.
71.
Z. Chen, S.K. Pang, K. Yasutake, and A. Rohatgi, "Plasma Enhanced Chemical Vapor
Deposited Oxide for Low Surface Recombination Velocity and High Effective Lifetime in
Silicon", Journal of Applied Physics, vol. 74, no. 4, pp. 2856-2859, August 1993.
72.
M.S. Ramanachalam, A. Rohatgi, W.B. Carter, J.P. Schaffer, and T.K. Gupta,
"Photoluminescence and PAS Study of ZnO Varistor Stability", Journal of Applied Physics,
vol. 24, no. 4, 1995.
73.
Z. Chen, K. Yasutake, A. Doolittle and A. Rohatgi, "Record Low SiO2/Si Interface State
Density for Low Temperature Oxides Prepared by Direct Plasma-Enhanced Chemical Vapor
Deposition", Applied Physics Letters, vol. 63, no. 15, pp. 1-3, October 1993.
74.
H.C. Chou and A. Rohatgi, "The Impact of MOCVD Growth Ambient on Carrier Transport,
Defects, and Performance of CdTe/CdS Heterojunction Solar Cells", Journal of Electronic
Materials, vol. 23, no. 1, pp. 1-7, January 1994.
75.
K. Yasutake, Z. Chen, S.K. Pang and A.Rohatgi, "Modeling and Characterization of
Interface State Parameters and Surface Recombination Velocity at Plasma Enhanced
Chemical Vapor Deposited SiO2-Si Interface", Journal of Applied Physics, vol. 75, no. 4,
pp. 2048-2054, February 1994.
76.
S.K. Pang and A. Rohatgi, "A New Methodology for Separating Schokley-Read-Hall
Lifetime and Auger Recombination Coefficients from Photoconductivity Decay Technique,
25
Journal of Applied Physics, vol. 74, no. 9, pp. 5554-5560, November 1993.
77.
P. Sana and A. Rohatgi, "Gettering and Hydrogen Passivation of EFG Multicrystalline
Silicon Solar Cells by Al Diffusion and Forming Gas Anneal", Applied Physics Letters, vol.
64, no. 1, pp. 97-99, January 1994.
78.
W.A. Doolittle and A. Rohatgi, "A New Figure of Merit and Methodology for Quantitatively
Determining Defect Resolution Capabilities in Deep Level Transient Spectroscopy
Analysis", Journal of Applied Physics, vol. 75, no. 9., pp. 4570-4575, May 1994.
79.
W.A. Doolittle and A. Rohatgi, "Comparison of Covariance Linear Predictive Modelling to
the Modulation Function Method for Use in Deep Level Transient Spectroscopy", Journal of
Applied Physics, vol. 75, no. 9., pp. 4560-4569, May 1994.
80.
A. Rohatgi, Z. Chen, P. Sana, N. Evers, R. Ramanachalam and A. Doolittle, "Gettering and
Passivation Techniques for Quality Enhancement of Multicrystalline Silicon", American
Institute of Physics Conference Proceedings #306. 12th Annual Photovoltaics Review, pp.
505-518, October 1993.
81.
A. Rohatgi, H.C. Chou, S. Kamra and A.K. Bhat, "Investigation of Efficiency Limiting
Defects and Rapid Thermal Processing of MOCVD Grown CdTe Solar Cells", American
Institute of Physics Conference Proceedings #306. 12th Annual Photovoltaics Review, pp.
354-363, October 1993.
82.
S.K. Pang, A. Rohatgi, and A.W. Smith, "Effect of Trap Location and Trap-Assisted Auger
Recombination on Silicon Solar Cell Performance", IEEE Transactions on Electron Device,
vol. 42, no.4, pp. 662-668, April 1995.
83.
Z. Chen, A. Rohatgi, R.O. Bell and J.P. Kalejs, "Defect Passivation in Multicrystalline-Si
Materials by Plasma Enhanced Chemical Vapor Deposition of SiO2/SiN Coatings", Applied
Physics Letters, vol. 65, no. 16, pp. 2078-2080, October 1994.
84.
H.C. Chou, A.K. Bhat, S. Kamra and A. Rohatgi, "An Investigation of Photocurrent Loss
due to Reflectance and Absorption in CdTe/CdS Heterojunction Solar Cells", Journal of
Electronic Materials, vol. 23, no. 7, pp. 681-686, July 1994.
85.
A. Rohatgi, Z. Chen, P. Sana, J. Crotty, and J. Salami, "Gettering and Passivation
Techniques of High Efficiency Multicrystalline Silicon Solar Cells", Solar Energy Materials
and Solar Cells, vol. 34, nos. 1-4, pp. 227-236, September 1994.
86.
A. Rohatgi, Z. Chen, P. Doshi, T. Pham, and D. Ruby, "High Efficiency Silicon Solar Cells
by Rapid Thermal Processing," Applied Physics Letters, vol. 65, no. 16, pp. 2087-2089,
October 1994.
26
87.
H.C. Chou, A. Rohatgi, E.W. Thomas, S. Kamra, and A.K. Bhat, "Effects of Cu on
CdTe/CdS Heterojunction Solar Cells with Cu/Au Contacts," Journal of the Electrochemical
Society, vol. 142, no. 1, pp. 254-259, January 1995.
88.
J.B. Lee, Z. Chen, M.G. Allen, and A. Rohatgi, "A Miniaturized High Voltage Solar Cell
Array as an Electrostatic MEMS Power Supply," Journal of Microelectromechanical
Systems, vol. 4, no. 3, pp. 102-108, September 1995.
89.
A. Rohatgi, Z. Chen, P. Sana, N. Evers, P. Lolgen, and R.A. Steeman, "Gettering and
Passivation for High Efficiency Multicrystalline Silicon Solar Cells,"OPTOELECTRONICS
- Devices and Technologies, vol. 9, no. 4, pp.523-536, December 1994.
90.
C. Leguijt, P. Lolgen, J.A. Eikelboom, P.H. Amesz, R.A. Steeman, W.C. Sinke, P.M. Sarro,
L.A. Verhoef, P.-P. Michiels, Z.H. Chen and A. Rohatgi, "Very Low Surface Recombination
Velocities on 2.5 Ω cm Si Wafers, Obtained With Low-Temperature PECVD of Si-Oxide
and Si-Nitride," Solar Energy Materials and Solar Cells, vol. 34, nos. 1-4, pp. 177-181,
1994.
91.
P. Doshi, A. Rohatgi, M. Ropp, Z. Chen and D.L. Meier, Rapid Thermal Processing of
High-Efficiency Silicon Solar Cells with Controlled In-Situ Anealing, Solar Energy
Materials and Solar Cells, vol. 41/42, pp. 31-39, 1996.
92.
G. Augustine, A. Rohatgi, N.M. Jokerst and R. Dhere, Concentration-Dependent Near and
Above Band Edge Absorption in Doped InP and Its Importance in Solar Cell Modelling,
Journal of Applied Physics, vol. 78, no. 4, pp. 2666-2670, August 1995.
93.
H.E. Elgamel, A.M. Barnett, A. Rohatgi, Z. Chen, C.Vinckler, J.Nijs, and R. Mertens,
Efficient Combination Schemes of High Efficiency Multicrystalline Silicon Solar Cells,
Journal of Applied Physics, vol. 78, no. 5, pp.3457-61, September 1995.
94.
A.Rohatgi, H.C. Chou, N.M. Jokerst, E.W. Thomas, C. Ferekides, S. Kamra, Z.C. Feng, and
K.M.Dugan, Effects of CdTe Growth Conditions and Techniques on the Efficiency Limiting
Defects and Mechanisms in CdTe Solar Cells, AIP Conference Proceedings,353, pp. 368375, May 1995.
95.
A.Rohatgi, P. Sana, L. Cai, W.A. Doolittle, S. Kamra, P. Doshi, T. Krygowski, and G.
Crotty, Fabrication and Analysis of High Efficiency Multicrystalline Silicon Solar Cells, AIP
Conference Proceedings, 353, pp. 126-133, May 1995.
96.
B.L.Sopori, X. Deng, J.P. Benner, A.Rohatgi, P. Sana, S.K. Estreicher, Y.K. Park,
M.A. Roberson, Hydrogen in Silicon: A Discussion of Diffusion and Passivation
Mechanisms, Solar Energy Materials & Solar Cells, 41/42, pp.159-169, July 1995.
27
97.
L.Cai, and A.Rohatgi, Effect of Post PECVD Photo-assisted Anneal on Multicrystalline
Silicon Solar Cells, IEEE Transactions on Electron Devices, vol. 44, no. 1, pp. 97-103,
August 1995.
98.
H.C. Chou, A.Rohatgi, N.M.Jokerst, S.Kamra, S.R. Stock, S.L. Lowrie, R.K.Ahrenkiel and
D.H. Levi, Approach Toward High Efficiency CdTe/CdS Heterojunction Solar Cells,
Journal of Material Chemistry Physics, 43, pp. 178-182, May 1995.
99.
H.C. Chou, A.Rohatgi, N.M. Jokerst,E.W. Thomas, and S.Kamra, Copper Migration in
CdTe Hetereojunction Solar Cells, IEEE Transactions on Electron Device, vol. 25, no. 7,
pp.1093-1098, 1995.
100.
Z.C. Feng, G.K.Lim, H.C.Chou, A.T.S. Wee, A.Rohatgi, and K.L.Tan, Correlations
Between the MOCVD-grown CdTe/CdS/SnO2/glass Solar Cell Efficiencies and the
Interface/Surface Properties, Journal of Applied Physics, vol.79, no.4, pg.2151-2153,
February 1996.
101.
S.S. Han, L.Cai, G. May, and A. Rohatgi, Modeling the Growth of PECVD Silicon Nitride
Films for Polysilicon Solar Cell Applications Using Neural Networks, IEEE Transactions on
Semiconductor Manufacturing, vol.9, no.3, pp. 303-311, August 1995.
102.
P.Doshi, J.Mejia, K.Tate, A.Rohatgi, Integration of Screen-Printing and Rapid Thermal
Processing Technologies for Silicon Solar Cell Fabrication, IEEE Electron Device Letters,
vol. 17, no. 8, pp. 404-409, August 1996.
103.
A. Rohatgi and S. Narasimha, Design, Fabrication, and Analysis of Greater than 18%
Efficient Multicrystalline Silicon Cells, Solar Cell and Solar Energy Materials, vol. 48,
pp.187-197, November, 1996.
104.
Z.C. Feng, A. Rohatgi, C.C. Tin, R-Hu, A.T.S. Wee, and K.P. Se, Structural
Optical and Surface Science Studies of 4H-SiC Epilayers Grown by Low Pressure Chemical
Vapor Deposition, Journal of Electronic Materials, vol. 25, pp. 917-923, 1996.
105.
L.Cai, D. Yang, M.A. El-Sayed, and A.Rohatgi, Effects of Rapid Thermal Anneal on
Refractive Index and Hydrogen Content of Plasma-Enhanced Chemical Vapor Deposited
Silicon Nitride Films,Applied Physics Letters, vol. 80, no. 9, pp. 5384-5388, November,
1996.
106.
L. Cai, S. Han, G. May, S. Kamra, T. Krygowski, and A. Rohatgi, Optimization of Saturation
Current Density of PECVD SiN Coated Phosphorus Diffused Emitters Using Neural Network
Modeling, Journal of Electronic Materials, vol. 25, no. 11, pp. 1784-1789, November 1996.
28
107.
A. Rohatgi, S. Narasimha, S. Kamra, Fabrication and Analysis of Record High 18.2%
Efficient Solar Cells on Multicrystalline Silicon Material, IEEE Electron Device Letters, vol.
17, no. 8, pp. 401-403, August 1996.
108.
T. Krygowski, and A. Rohatgi, A Novel Approach Towards the Simultaneous Diffusion of
Boron and Phosphorus in Silicon, Journal of Electrochemical Society, vol 144, pp. 346-349,
January, 1997.
109.
M. Ropp, M. Begovic, A. Rohatgi and R. Long, Design Consideration for Large RoofIntegrated Photovoltaic Arrays, Progress in Photovoltaics, vol. 5, pp. 55-67, September,
1997.
110.
P. Doshi, J.Mejia, K. Tate and A. Rohatgi, Modeling and Characterization of HighEfficiency Silicon Solar Cells Fabricated by Rapid Thermal Processing, Screen Printing, and
Plasma Enhanced Chemical Vapor Deposition, IEEE Transactions of Electron Devices, vol.
44, no. 9, pp. 1417-1424, September, 1997.
111.
P. Doshi, G.E. Jellison and A. Rohatgi, Characterization and Optimization of Absorbing
PECVD Antireflection Coatings for Silicon Photovoltaics, Journal of Applied Optics,
vol.36, no. 30, pp. 7826-7837, October, 1997.
112.
A. Rohatgi, S. Narasimha and L. Cai, Gettering and Passivation of High Efficiency
Multicrystalline Silicon Solar Cells, American Institute of Physics Conference Proceedings,
vol. 394, pp. 199-213, November,1997.
113.
T. Krygowski and A. Rohatgi, A Simultaneously Diffused Textured, In-Situ Oxide ARCoated Solar Cell Process for High Efficiency Silicon Solar Cells, IEEE Electron Devices
Letters, vol. 45, no. 1, pp. 194-199, January 1998.
114.
S. Narasimha and A. Rohatgi, Fabrication and Characterization of 18.6% Efficient on
Multicrystalline Silicon Solar Cells IEEE Transactions on Electron Devices, vol. 45, no 8,
pp. 1776-1783 August, 1998.
115.
P.Doshi and A. Rohatgi, 18% Efficient Silicon Photovoltaic Devices by Rapid Thermal
Diffusion and Oxidation, IEEE Transactions on Electron Devices, vol. 45, no. 8, pp. 17101716, August, 1998.
116.
A. Rohatgi, P. Doshi and T. Krygowski, Pushing the Frontiers of Silicon PV Technologies:
Novel Approaches to High Efficiency, Manufacturable Silicon Cells,American Institute of
Physics , vol. 404, pp. 109-116, March, 1997.
117.
S. Narasimha, G. Crotty, A. Rohatgi, and D.L. Meier, Back Surface Field Effects in the 17.3
% Efficient n-type Dendritic Web Silicon Solar Cell, Solid-State Electronics, vol. 42, no. 9,
29
pp. 1631-1640, November, 1997.
118.
R.L. Wallace, J.I. Hanoka, A. Rohatgi and G. Crotty, Thin Film String Ribbon, Solar
Energy Materials and Solar Cells, vol. 48, pp. 179-186, November, 1997.
119.
L. Cai, M. Zou, S. Han, G. May and A. Rohatgi, Investigation of the Properties of PlasmaEnhanced Chemical Vapor Deposited Silicon Nitride and Its Effect on Silicon Surface
Passivation, Journal of Applied Physics, vol. 83, no. 11, pp. 5885-5889,
June 1998.
120.
S. Narasimha and A. Rohatgi, Effective Passivation of the Low Resistivity Silicon Surface
by a Rapid Thermal Oxide/Plasma Silicon Nitride Stack, Applied Physics Letter, vol. 72, pp.
1872-1874, April, 1998.
121.
M.E. Ropp, M. Begovic and A. Rohatgi, Prevention of Islanding in Grid-Connected
Photovoltaic Systems, Journal of Progress in Photovoltaics, volume 7, Issue 1, 1999 pg. 3959, February.
122.
M.E. Ropp, M. Begovic, A. Rohatgi, Analysis and Performance Assessment of the Active
Frequency Drift Method of Islanding Prevention, IEEE Power Engineering Society, April,
1998.
123.
D. Ratakonda. R. Singh, L. Vedula, A. Rohatgi, J. Mejia, and S. Narayanan, Rapid Thermal
Processing of Screen Printed Ohmic Contacts, Journal of Electrochemical Society, vol. 144,
no. 9, pp. 3237-3242, September, 1997.
124.
G.E. Jellison, Jr., F.A. Modine, P. Doshi, A. Rohatgi, Spectroscopic Ellipsometry
Characterization of Thin-Film Silicon Nitride, pp. 193-197, Thin Solid Films, July, 1998.
125.
A. Rohatgi, P. Doshi, J. Moschner, T. Lauinger, A. Aberle and D.S. Ruby, Comprehensive
Study of Rapid, Low-Cost Silicon Surface Passivation Technologies, IEEE Transaction on
Electron Devices, vol. 47, #5 pp. 987-993, May, 2000.
126.
A. Ebong, P. Doshi, S. Narasimha, A. Rohatgi J. Wang and M.A. El-Sayed, The Effect of
Low and High Temperature Anneals on the Hydrogen Content and Passivation of Si Surface
Coated with SiO2 and SiN Films, Journal of Electrochemical Society, vol. 146, no. 5, pp.
1921-1924, May 1999.
127.
T. Krygowski, A. Rohatgi and T. Selzer, A Novel Processing Technology for HighEfficiency Silicon Solar Cells, Journal of the Electrochemical Society, vol. 146, no. 3,
March 1999.
128.
A. Rohatgi, S. Narasimha, P. Doshi, A. Ebong, and J. Moschner, Rapid Thermal Processing
30
and Screen-Printing for Low Cost Silicon Solar Cells, American Institute of Physics, NCPV
Photovoltaics Program Review, edited by M. Al-Jassim, J.P. Thornton, and J.M. Gee, pp.
354-360, March 1999.
129.
A. Rohatgi and J. Moschner, Comments on 17.3% Efficiency Metal-Oxide-Semiconductor
(MOS) Solar Cells with Liquid-Phase-Deposited Silicon Dioxide IEEE Electron Device
Letters, vol. 19, no. 11, pp 447, November 1998.
130.
A. Rohatgi, S. Narasimha, A. Ebong and P. Doshi, Understanding and Implementation of
Rapid Thermal Technologies for Low-Cost High-Efficiency Silicon Solar Cells, IEEE
Transaction on Electron Devices vol. 46, no. 10, pp. 1970 - 1977, October, 1999.
131.
R. Singh, K.C. Cherukuri, L. Vedula, A. Rohatgi and S. Narayanan, Low Temperature
Shallow Junction Formation Using Vacuum Ultraviolet Photons During Rapid Thermal
Processing, vol. 70, no 13, pp. 1700-1702, March, 1997.
132.
S. Narasimha, A. Rohatgi and A.W. Weeber, An Optimized Rapid Aluminum Back Surface
Field Technique for Silicon Solar Cells, IEEE Transaction on Electron Devices, vol. 46, no.
7, pp. 1363-1370, July, 1999.
133.
M. E. Ropp, M. Begovic, A. Rohatgi, G. Kern, R. Bonn, and S. Gonzalez, Determining the
Relative Effectiveness of Islanding Detection Methods Using Phase Criteria and
Nondetection Zones, IEEE Transaction on Electron Devices, vol. 15, no. 3, pp. 290-296,
March, 1999.
134.
R. Singh, V. Parihar, S. Venkataraman, K.F. Poole, R.P.S. Thakur, and A. Rohatgi
Changing from Rapid Thermal Processing to Rapid Photothermal Processing:What
Does It Buy for a Particular Technology?, Materials Science in Semiconductor Processing,
pp. 219-230, 1999.
135.
A. Rohatgi, Fundamental Understanding and Development of High Quality Screen-Printed
Contacts for Silicon Solar Cells, submitted for publication in Journal of Electronic
Materials, June, 1999.
136.
J. B. Lee, M.G. Allen, and A. Rohatgi, Photovoltaic On-Demand Pulse Generator as an OnBoard Power Source for Electrostatic Actuator Array, SPIE Symposium on Micromachining
and Microfabrication, Santa Clara, California, September 19-23, 1999.
137.
A. Ebong, J. Brody, A. Rohatgi and T. Williams, Optimization of Front Metal Contact
Firing Scheme To Achieve High Fill Factors On Screen Printed Silicon Solar Cells, Solar
Energy Materials and Solar Cells, vol. 65, no. 1-4, pp. 613-619, January 2001.
138.
D.L. Meier, H.P. Davis, R. A. Garcia, J. Salami, A. Rohatgi, A. Ebong, and P. Doshi
31
Aluminum Alloy Back P-N Junction Dendritic Web Silicon Solar Cell, Solar Energy
Materials and Solar Cells, vol. 65, no. 1-4, pp. 621-627, January 2001.
139.
S. Venkataraman, R. Singh, V. Parihar, K. F. Poole, A. Rohatgi, V. Yelundur, and A.Ebong,
A Study of the Effect of Ultraviolet (UV) and Vacuum Ultra Violet (VUV) Photons on the
Minority Carrier Lifetime of Single Crystal Silicon Processed by Rapid Thermal and Rapid
Photothermal Processing, Journal of Electronic Materials, vol. 28, no. 12, pp. 1394-1398,
December,1999.
140.
A. Rohatgi, A. Ebong, V. Yelundur and A. Ristow, Rapid Thermal Processing of Next
Generation Silicon Solar Cells, Progress in Photovoltaics Research and Applications, vol. 8,
pp. 515-527, July, 2000.
141.
V. Yelundur, A. Rohatgi, A. Ebong, A.M. Gabor, J. Hanoka, R.L. Wallace, Al-Enhanced
PECVD SiNx induced Hydrogen Passivation in String Ribbon Silicon, Journal of Electronic
Materials, vol. 30, no 5, pp. 526-529, February, 2000.
142.
A. Ebong, J. Brody, A. Rohatgi, and T. Williams, Optimization of Front Metal Contact
Firing Scheme To Achieve High Fill Factors On Screen Printed Silicon Solar Cells, Solar
Energy Materials & Solar Cells, vol. 65, pp. 613-619, February, 2001.
143.
J.Jeong, M. Rosenblum, J. Kalejs and A. Rohatgi, Hydrogenation of Defects in EdgeDefined Film-Fed Grown Aluminum-Enhanced Plasma Enhanced Chemical Vapor
Deposited Silicon Nitride Multicrystalline Silicon, Journal of Applied Physics, vol. 87, #10,
pp 7551-7557, May, 2000.
144.
B. Damiani, A.H. Ristow, A.Ebong, and A. Rohatgi, Design Optimization for Higher
Stabilized Efficiency and Reduced Light Induced Degradation in Boron Doped Czochralski
Silicon Solar Cells, Progress in Photovoltaics, vol. 10, pp. 185-193, January, 2001.
145.
A. Ebong, M. Hilali, A. Rohatgi, D. Meier, and D.S. Ruby, Belt Furnace Gettering and
Passivation of n-Web Silicon for High Efficiency Screen-Printed Front Surface Field Solar
Cells, Progress in Photovoltaics, vol. 9, pp. 327-332, February, 2001.
146.
J. Brody, and A. Rohatgi, “Analytical Approximation of Effective Surface Recombination
Velocity of Dielectric-Passivated P-Type Silicon,” Solid State Electronics, vol. 45, pp. 15491557, February, 2001.
147.
J. Brody, A. Rohatgi, and V. Yelundur, Bulk Resistivity Optimization for Low BulkLifetime Silicon Solar Cells, Progress in Photovoltaics, vol. 9, pp. 273-285, February, 2001.
148.
M.Hilali, A. Ebong, A. Rohatgi and D.L. Meier, “Resistivity Dependence of Minority
Carrier Lifetime and Cell Performance in P-Type Dendritic Web Silicon Ribbon,” Solid
32
State Electronics, vol. 45, pp.1973-1978, June, 2001.
149.
J. Brody, and A. Rohatgi, “Review and Comparison of Equations Relating Bulk Lifetime
and Surface Recombination Velocity to Effective Lifetime Measured Under Flash Lamp
Illumination,” Journal of Applied Physics, vol. 77, pp. 293-301, July 2002.
150.
A. Ebong, Y.H. Cho, M. Hilali, A. Rohatgi and D. Ruby, “Rapid Thermal Technologies for
High Efficiency Silicon Solar Cells,” Solar Energy Materials & Solar Cells, vol 74. pp. 5155, August, 2002.
151.
A. Rohatgi, V. Yelundur, J. Jeong, A. Ebong, M.D. Rosenblum, and R.L. Wallace,
“Fundamental Understanding and Implementation of Al-Enhanced PECVD SiNx
Hydrogenation in Silicon Ribbons,” vol. 74, no. 1-4, pp. 117-126, Solar Energy Materials &
Solar Cells, October 20, 2002.
152.
J. Brody and A. Rohatgi, “Sensitivity Analysis of Two-Spectrum Separation of Surface and
Bulk Components of Minority Carrier Lifetimes,” Solid State Electronics, vol. 46, pp. 859866, March 2002.
153.
V. Yelundur, A. Rohatgi, J.W. Jeong, J. Hanoka, “Improved String Ribbon Silicon Solar
Cell Performance by Rapid Thermal Firing of Screen-Printed Contacts,” IEEE Transaction
on Electron Devices, vol. 49, no. 8, pp 1405-1410, February 2002.
154.
M. Begovic, A. Pregelj, A. Rohatgi and C. Honsberg, “Green Power: Status and
Perspectives,” IEEE Transactions on Electron Devices, vol. 89, no. 12, pp 1734-1743,
December 2001.
155.
J. W. Jeong, A. Rohatgi, V. Yelundur, A. Ebong, M.D. Rosenblum and J.P. Kalejs,
“Enhanced Silicon Solar Cell Performance by Rapid Thermal Firing of Screen Printed
Metals,” IEEE Transactions on Electron Devices, vol. 48, no. 12, pp. 2836-2841, May,
2001.
156.
A. Rohatgi, and J.W. Jeong, “High Efficiency Screen-Printed Silicon Ribbon Solar Cells by
Effective Defect Passivation and Rapid Thermal Processing,” Applied Physics Letters, vol.
82, no. 2, pp 224-226, July, 2002.
157.
D. S. Ruby, S. H. Zaidi, S. Narayanan, B.M. Damiani and A. Rohatgi, “Rie-texturing of
Multicrystalline Silicon Solar Cells,” Solar Energy Materials & Solar Cells, vol. 74, pp. 133137, October, 2002.
158.
A. Rohatgi, D.S. Kim, K. Nakayashiki, V. Yelundur and B. Rounsaville, “High-Efficiency
Solar Cells on Edge-Defined Film-Fed Grown (18.2%) and String Ribbon (17.8%) Silicon
by Rapid Thermal Processing,” Applied Physics Letters, vol. 84, no.1, pp. 145-147,
33
January, 2004.
159.
K. Nakayashiki, V. Meemongkolkiat and A. Rohatgi, “High Efficiency Screen-Printed EFG
Si Cells Through Rapid Thermal Processing-Induced Bulk Lifetime Enhancement,”
Progress in Photovoltaics: Research and Application, vol. 13, no.1, pp. 17-25, 2005.
160.
A. Pregelj, M. Begovic and A. Rohatgi, “Quantitative Techniques for Analysis of Large
Data Sets in Renewable Distributed Generation,” IEEE Transaction on Electron Devices,
vol. 19, pp 1277-1285, February, 2004.
161.
A. Rohatgi, M. Hilali and K. Nakayashiki, “High-Efficiency Screen-Printed Solar Cell on
Edge-Defined Film-Fed Grown Ribbon Silicon Through Optimized Rapid Belt Co-Firing of
Contacts and High-Sheet-Resistance Emitter,” Applied Physics Letters, vol 84, no.17, pp.
3409-3411, February, 2004.
162.
K. Nakayashiki, D. S. Kim, A. Rohatgi, B. R. Bathey, “Understanding of the RTP-assisted
Reduction of Hydrogen Dissociation from Defects in EFG Si,” Solar Energy Materials &
Solar Cells, January 26-30, 2004, Chulalongkorn University, Bangkok, Thailand.
163.
V. Meemongkolkiat, M. Hilali, K. Nakayashiki, and A. Rohatgi, “Process and Material
Dependence of Al-BSF in Crystalline Si Solar Cells,” Solar Energy Materials & Solar Cells,
January 26-30, 2004, Chulalongkorn University, Bangkok, Thailand.
164.
A. Rohatgi, D. S. Kim, V. Yelundur, K. Nakayashiki, A. Upadhyaya, M. Hilali, V.
Meemongkolkiat, “Record-High-Efficiency Solar Cells on Multicrystalline Materials
Through Understanding and Implementation of RTP-Enhanced SiNx-induced Defect
Hydrogenation,” Solar Energy Materials & Solar Cells, January 26-30, 2004, Chulalongkorn
University, Bangkok, Thailand.
165.
F. Jiang, M. Stavola, A. Rohatgi, D. Kim, J. Holt, H. Atwater and J. Kalejs, “Hydrogenation
of Si from SiNx Films: Characterization of H introduced into the Si,” Applied Physics
Letters, vol. 83, no. 5, pp. 931-933, August, 2003.
166.
M. Hilali, A. Rohatgi, and S. Asher, “Development of Screen-Printed Silicon Solar Cells
with High Fill Factors on 100 /sq Emitters,” IEEE Transactions on Electron Devices, vol.
51, no.6, pp. 948-955, June 2004.
167.
I. Tarasov, S. Ostapenko, K. Nakayashiki and A. Rohatgi, “Defect Passivation in
Multicrystalline Silicon for Solar Cells,” Applied Physics Letters, vol. 85, no 19, pp. 43464348, November, 2004.
168.
K. Nakayashiki, A. Rohatgi, S. Ostapenko and I. Tarasov, “Minority Carrier Lifetime
Enhancement in Edge-Defined Film-Fed Grown Si through Rapid Thermal ProcessingAssisted Reduction of Hydrogen-Defect Dissociation,” Journal of Applied Physics, vol 97,
34
no. 02, pp. 1-8, January, 2005.
169.
A. Upadhyaya, M. Sheoran and A. Rohatgi “High-Efficiency Screen-Printed Belt Co-Fired
Solar Cells on Cast Multicrystalline Silicon” Applied Physics Letters, vol. 86, pp.1-5,
January, 2005.
170.
D.S. Kim, V. Yelundur, K. Nakayashiki, B. Rounsaville, V. Meemongkolkiat, A. M. Gabor
and A. Rohatgi, “Ribbon Si Solar Cells with Efficiencies over 18% by Hydrogenation of
Defects” Solar Energy and Solar Cells, vol. 90, pp 1227-1240, 2006.
171.
K. Nakayashiki, V. Meemongkolkiat and A. Rohatgi, “Effect of Material Inhomogeneity on
the Open-Circuit Voltage of String Ribbon Si Solar Cells,” IEEE Transactions on Electron
Devices, vol.52, no. 10, pp. 2243-2249, October, 2005.
172.
V. Meemongkolkiat, K. Nakayashiki, A. Rohatgi, G. Crabtree, J. Nickerson and T.L. Lester,
“Resistivity and Lifetime Variation along Commercially Grown Ga- and B-Doped
Czochralski Si Ingots and Its Effect on Light-Induced Degradation and Performance of Solar
Cells”, Progress in Photovoltaics, vol. 14, pp. 125-134, March, 2006.
173.
M. Hilali, K. Nakayashiki, C. Khadilkar, R. Reedy, B.To, A. Rohatgi, A. Shaikh and S. Kim,
“The Effect of Ag Particle Size in Thick-Film Ag Paste on the Electrical and Physical
Properties of Screen-Printed Contacts and Silicon Solar Cells”, Journal of Electrochemical
Society, vol. 153, no. 1, pp A5-A11, 2006.
174.
M. Hilali, M. M. Al-Jassim, B. To, H. Moutinho, A. Rohatgi and S. Asher, “Understanding
the Formation and Temperature Dependence of Thick-Film Ag Contacts on High SheetResistance Si Emitters for Solar Cells, Journal of the Electrochemical Society, vol. 153, no.
10, pp. G742-G749, April, 2005.
175.
V. Meemongkolkiat, K. Nakayashiki, D.S. Kim, R. Kipecek and A. Rohatgi, “Factors
Limiting the Formation of Uniform and Thick Al-Back Surface Field and Its Potential,”
Journal of Electrochemical Society, vol. 153., no 1, pp. G53-G58, 2006.
176.
M. Hilali, K. Nakayashiki and A. Rohatgi, “High Efficiency (19%) Screen-Printed Textured
Cells on Low-Resistivity Float-Zone Silicon with High Sheet-Resistance Emitters,” Progress
in Photovoltaics, vol. 14, no. 2, p. 135-144, October, 2005.
177.
D.S. Kim, M.M. Hilali, A. Rohatgi, K. Nakano, A. Hariharan and K. Matthei, “Development
of a Novel Phosphorus Spray Diffusion System for Low Cost Silicon Solar Cells,” Journal
of Electrochemical Society, vol. 153, pp A1391-A1396, 2006.
178.
A. Rohatgi, A. Upadhyaya and M. Sheoran, “High-Efficiency Screen-Printed Belt Co-Fired
Solar Cells on Cast Multicrystalline Silicon,” Applied Physics Letters, vol. 86, no. 5, pp.
35
54103, 1-3, 2005.
179.
D.S. Kim, A.M. Gabor and A. Rohatgi, “String Ribbon Silicon Solar Cells with 17.8%
Efficienciey”, Journal of the Korean Physical Society, vol. 47, no.1, pp 157-162, 2005.
180.
K. Nakayashiki, B. Rounsaville, V. Yelundur, D.S. Kim, A. Rohatgi, R. Clark-Phelps, and
J.I. Hanoka, “Fabrication and Analysis of High-Efficiency String Ribbon Si Solar Cells,
Solid State Electronics, vol. 50, pp 1406-1412, 2006.
181.
A. Pregelj, M. Begović, and A. Rohatgi, “Recloser allocation for improved reliability of DGenhanced distribution networks,” IEEE Transactions on Power Systems, vol. 21, pp. 14421449, 2006.
182.
M. Sheoran, A. Upadhyaya, and A. Rohatgi, “A comparison of bulk lifetime, efficiency and
light-induced degradation in boron and gallium doped cast multicrystalline silicon solar
cells,” IEEE Transactions on Electron Devices, vol. 53, pp. 2764-2772, 2006.
183.
S. Kleekajai, F. Jiang, M. Stavola, V. Yelundur, K. Nakayashiki, A. Rohatgi, S. Seren, G.
Hahn, and J. Kalejs, “Concentration and penetration depth of H introduced into crystalline
Si by hydrogenation methods used to fabricate solar cells,” Journal of Applied Physics, vol.
100, pp. 093517/1-7, 2006.
184.
M.M. Hilali, S. Sridharan, C. Khadilkar, A. Shaikh, A. Rohatgi, and S. Kim, “The effect of
glass frit chemistry on the physical and electrical properties of thick-film Ag contacts for
silicon solar cells,” Journal of Electronic Materials, vol. 35, pp. 2041-2047, 2006.
PUBLISHED JOURNAL PAPERS (Non-refereed)
1.
A. Rohatgi, S. R. Butler, and F. J. Feigl, "Sodium Neutralization Characteristics of HCl
Oxides in MOS Structures", (abstract 77-1), Journal of the Electrochemical Society, vol. 78,
pg. 219, 1977.
2.
S. R. Butler, F. J. Feigl, A. Rohatgi, H. W. Kraner, and K. W. Jones, "CL Incorporation in
SiO2 Prepared by Oxidation of Si in O2-HCl Ambients", (abstract 77-1), Journal of the
Electrochemical Society, 77-1, vol. 77, pg. 217, 1977.
3.
L. H. Slack, A. F. Carroll, and A. Rohatgi, "Conduction in Heat Treated Tin Oxide Films",
(abstract 19E-77F), Journal of American Ceramic Society Bulletin, vol. 56, No 8, pg. 125,
1977.
4.
J. Mankowski, R. E. Tressler, J. Stack, A. Rohatgi, D. B. Williams, and S. R. Butler,
36
"Inhomogeneous Chlorine Distributions in Silicon Oxides Grown in HCl-O2 Mixtures",
(abstract 78-2), Journal of the Electrochemical Society, vol. 211, pg. 566, 1978.
5.
A. Rohatgi and P. Rai-Choudhury, "Carrier Lifetime Enhancement in Silicon", (abstract 791), Journal of the Electrochemical Society, vol. 207, pg. 540, 1979.
6.
R. B. Campbell and A. Rohatgi, "Evaluation of Cost-Effective Contact Systems for Solar
Cells", (abstract 79-1), Journal of the Electrochemical Society, vol. 196, pg. 515, 1979.
7.
J. R. Davis, R. H. Hopkins, P. Rai-Choudhury, P. D. Blais, A. Rohatgi, J. R. McCormick,
and H. C. Mollenkopf, "Impurity Effects in Silicon Solar Cells", (abstract 79-1), Journal of
the Electrochemical Society, vol. 65, pg. 174, 1979.
8.
J. R. Davis, R. H. Hopkins, A. Rohatgi, P. D. Blais, P. Rai-Choudhury, R. B. Campbell, J.
R. McCormick, and H. C. Mollenkopf, "Impurities in Silicon", (abstract 80-1), Journal of
the Electrochemical Society, vol. 301, pg. 757, 1980.
9.
A. Rohatgi, M. R. Chin, P. Rai-Choudhury, S. Fonash, R. Singh, and P. A. Lester, "Effect of
Process Parameters on Si Surface Damage Induced by CCl4 Reactive Ion Etching", (abstract
83-2), Journal of the Electrochemical Society, vol. 320, 1983.
10.
A. Rohatgi, J. P. Schaffer, S. K. Pang, T. K. Gupta, and W. D. Straub, "Defect
Characterization of Thermally Treated ZnO Varistor", (abstract 1820 RNP), Journal of the
Electrochemical Society, October 1987.
PAPERS IN CONFERENCE PROCEEDINGS (Refereed)
1.
J.R. Davis, A. Rohatgi, P. Rai-Choudhury, P. D. Blais, R. H. Hopkins, and J.R. McCormick,
"Characterization of the Effects of Metallic Impurities on Silicon Solar Cell Performance",
Proceedings of the 13th IEEE Photovoltaic Specialists Conference, Washington D.C, pp.
490-495, 1978.
2.
R. G. Seidensticker, R. E. Kothmann, J. P. McHugh, C. S. Duncan, R. H. Hopkins, P. D.
Blais, J. R. Davis, and A. Rohatgi, "Computer Modeling of Dendritic Web Growth Process
and Characterization of the Material", Proceedings of the 13th IEEE Photovoltaic Specialists
Conference, Washington D.C, pp. 358-362, 1978.
3.
J. Davis and A. Rohatgi, "Theoretical Design Considerations for Back Surface Field Solar
Cells", Proceedings of the 14th IEEE Photovoltaic Specialists Conference, San Diego,
California, pp. 569-572, January 1980.
4.
R. B. Campbell, A. Rohatgi, E. J. Seman, J. R. Davis, P. Rai-Choudhury, and B. D.
37
Gallagher, "Solar Cells and Modules from Dendritic Web Silicon", Proceedings of the 14th
IEEE Photovoltaic Specialists Conferences, San Diego, California, pp. 332-336, January
1980.
5.
A. Rohatgi, R. B. Campbell, J. R. Davis, R. H. Hopkins, P. Rai-Choudhury, and J. R.
McCormick, "POCl Gettering of Titanium, Molybdenum, and Iron Contaminated Silicon
Solar Cells", Proceedings of the 14th IEEE Photovoltaic Specialists Conference, San Diego,
California, pp. 908-911, January 1980.
6.
A. Rohatgi, "Radiation Tolerance of Boron Doped Dendritic Web Silicon Ribbon",
Proceedings of the Fourth Solar Cell High Efficiency and Radiation Damage Conference,
NASA Lewis Research Center, Cleveland, Ohio, pp. 281-284, 1980.
7.
A. Rohatgi, J. R. Davis, P. Rai-Choudhury, R. G. Seidensticker, and R. B. Campbell, "High
Efficiency and Radiation Hard Solar Cells from Dendritic Web Silicon Ribbon",
Proceedings of the Symposium on Materials and New Processing Technologies for
Photovoltaics, J. A. Amick et al. (eds.), Electrochemical Society, vol. 81-3, pp. 108-118,
1981.
8.
M. H. Hanes, R. H. Hopkins, A. Rohatgi, P. Rai-Choudhury, R. B. Campbell, and M. H.
Mollenkopf, "The Thermal Stability of Impurities in Silicon Solar Cells", Proceedings of the
15th IEEE Photovoltaic Specialists Conference, Orlando, Florida, pp. 530-533, June 1981.
9.
R. H. Hopkins, J. R. Davis, and A. Rohatgi, "Silicon Purity: Impact on Crystal Growth and
Silicon Properties", Proceedings of the Silicon Materials Preparation Workshop JPL,
Tempe, Arizona, 1982.
10.
J. R. Davis, R. H. Hopkins, and A. Rohatgi, "Definitions of Solar Grade Silicon",
Proceedings of the Third Symposium on Materials and New Processing Technologies for
Photovoltaics, J. P. Dismukes et al. (eds.), Electrochemical Society, vol. 82-8, pp. 14-25,
1982.
11.
H. M. Hobgood, L. B. Ta, A. Rohatgi, and R. N. Thomas, "Residual Impurities and Defect
Levels in Semi-Insulating GaAs Grown by Liquid Encapsulated Czochralski", Second
Proceedings of the Semi-Insulating III-V Materials, S. Makram-Ebeid and B. Tuck (eds.),
Shiva Publishing Ltd., Cheshire, England, pp. 28-35, 1982.
12.
A. Rohatgi, J. R. Davis, R. H. Hopkins, and P. Rai-Choudhury, "Impurities in Polysilicon
Solar Cells", Proceedings of the 16th IEEE Photovoltaic Specialists Conference, San Diego,
California, pp. 411-416, 1982.
13.
R. Singh, S. J. Fonash, A. Rohatgi, and P. Rai-Choudhury, "Low Energy Hydrogen
Implantation Passivation for Web Silicon", Proceedings of the European Photovoltaics
38
Conference, Athens, Greece, October 1983.
14.
A. Rohatgi and P. Rai-Choudhury, "Surface Passivated High Efficiency Solar Cells,
Proceedings of the 17th IEEE Photovoltaic Specialists Conference, Orlando, Florida, pp.
409-414, 1984.
15.
E. F. Federmann and A. Rohatgi, "The Decisive Impact of Cell Efficiency on the
Implementation of Photovoltaic Systems, Proceedings of the 17th IEEE Photovoltaic
Specialists Conference, Orlando, Florida, pp. 520-526, 1984.
16.
D. L. Meier, R. B. Campbell, A. Rohatgi, P. Alexander, S. J. Fonash, and R. Singh, "Emitter
Formation in Dendritic Web Silicon Solar Cells", Proceedings of the 17th IEEE
Photovoltaic Specialists Conference, Orlando, Florida, pp. 427-433, 1984.
17.
R. C. Clarke, M. C. Driver, and A. Rohatgi, "Reactive Ion Etching of 3-D Structures in
GaAs", Proceedings of the Gomac Conference, Las Vegas, Nevada, pp. 340-344, November
1984.
18.
A. Rohatgi, P. Rai-Choudhury, T. W. O’Keefe, and B. E. Yoldas, "High Efficiency Solar
Cells in Float Zone and Dendritic Web Silicon Ribbon", Proceedings of the Symposium on
Materials and New Processing Technologies for Photovoltaics, J. P. Dismukes et al. (eds.),
Electrochemical Society, vol. 85-9, pp. 252-260, 1985.
19.
A. Rohatgi, "Process and Design Considerations for High Efficiency Solar Cells",
Proceedings of the Flat-Plate Solar Array Project Research Forum on High Efficiency
Crystalline Silicon Solar Cells, JPL Publication 85-38, pp. 429-442, May 1985.
20.
A. Rohatgi, S. Gupta, P. G. McMullin, P. A. Palaschak, P. Rai-Choudhury, and B. D.
Gallagher, "Laser Written Metallization Patterns for Low-Cost High-Efficiency Solar Cells",
Proceedings of the 18th IEEE Photovoltaic Specialists Conference, Las Vegas, Nevada, pp.
782-786, October 1985.
21.
D. L. Meier, J. Greggi, A. Rohatgi, T. W. O'Keefe, P. Rai-Choudhury, R. B. Campbell, and
S. Mahajan, "Twin Plane Effects in Dendritic Web Silicon", Proceedings of the 18th IEEE
Photovoltaic Specialists Conference, Las Vegas, Nevada, pp. 596-603, October 1985.
22..
Rohatgi, D. L. Meier, T. W. O'Keefe, and P. Rai-Choudhury, "High Efficiency Solar Cells
on Low-Resistivity Dendritic Web Silicon Ribbon", Proceedings of the 18th IEEE
Photovoltaic Specialists Conference, Las Vegas, Nevada, pp. 50-54, October 1985.
23.
A. Rohatgi, "A Review of High-Efficiency Silicon Solar Cells", Proceedings of the 18th
IEEE Photovoltaic Specialists Conference, Las Vegas, Nevada, pp. 7-13, October 1985.
39
24.
R. B. Campbell, E. Dombrowski, J. R. Easoz, E. L. Kochka, C. S. Duncan, R. H. Hopkins,
D. L. Meier, J. P. McHugh, A. Rohatgi, P. Rai-Choudhury, and R. G. Seidensticker, "Status
of Solar Cells and Modules Fabricated from Dendritic Web Silicon", Proceedings of the
18th IEEE Photovoltaic Specialists Conference, Las Vegas, Nevada, pp. 465-469, October
1985.
25.
T. F. Ciszek, T. Wang, and A. Rohatgi, "Some Effects of Crystal Growth Parameters on
Minority Carrier Lifetime in Float-Zoned Silicon", Proceedings of the Symposium on
Materials and New Processing Technologies for Photovoltaics, Electrochemical Society, vol.
87-10, pp. 230-234, 1987.
26.
S. K. Pang, J. Schaffer, and A. Rohatgi, "Effect of Oxygen on Lifetime and Defects in
Magnetic Czochralski Silicon, Proceedings of the 19th IEEE Photovoltaic Specialists
Conference, New Orleans, Louisiana, pp. 1500-1501, May 1987.
27.
S. K. Pang, A. Rohatgi, and T. F. Ciszek, "Doping Dependence of Minority Carrier Lifetime
in Silicon Ga-Doped", Proceedings of the 20th IEEE Photovoltaic Specialists Conference,
Las Vegas, Nevada, pp. 435-440, Sept. 1988.
28.
A. W. Smith and A. Rohatgi, "Modeling the Effect of Trap Level on Optimum Resistivity
for High Efficiency Cells", Proceedings of the 20th IEEE Photovoltaic Specialists
Conference, Las Vegas, Nevada, pp. 729-734, Sept. 1988.
29.
G. Augustine, A. W. Smith, A. Rohatgi, and C. J. Keaveny, "Characterization and Modeling
of InP Solar Cells", Proceedings of the 20th IEEE Photovoltaic Specialists Conference, Las
Vegas, Nevada, pp. 903-907, Sept. 1988.
30.
S. A. Ringel and A. Rohatgi, "Material Quality and Design Optimization for High Efficiency
GaAs Solar Cells", Proceedings of the 20th IEEE Photovoltaic Specialists Conference, Las
Vegas, Nevada, pp. 666-671, Sept. 1988.
31.
A. Rohatgi, R. Sudharsanan, S. A. Ringel, M. V. Meyers, and C. H. Liu, "Wide Bandgap
Thin Film Solar Cells from CdTe Alloys", Proceedings of the 20th IEEE Photovoltaic
Specialists Conference, Las Vegas, Nevada, pp. 1477-1481, Sept. 1988.
32.
S. Perkowitz, Z. C. Feng, A. Erbil, R. Sudharsanan, K. T. Pollard, and A. Rohatgi, "Raman
and Photoluminescence Analysis of CdMnTe Thin Films", Proceedings of SPIE -Raman
Scattering, Luminescence, and Spectroscopic Instrumentation in Technology, pp. 76-84,
1989.
33.
A. Rohatgi, J. P. Schaffer, and A. B. Dewald, "Defect Characterization in Semiconductors
by Positron Annihilation Spectroscopy", Proceedings of the Symposium on Materials and
New Processing Technologies for Photovoltaics, T. J. Shaffner and D. K. Schroder (eds.),
40
Electrochemical Society, vol. 88-20, pp. 168-184, 1988.
34.
A. Rohatgi, A. W. Smith, S. K. Pang, and P. A. Basore, "Impact of Deep Level Positron and
Light Trapping on Silicon Cell Performance", Proceedings of the 4th International
Photovoltaic Science and Engineering Conference, Sydney, Australia, February 1989.
35.
A. Rohatgi, A. W. Smith, and S. A. Ringel, "Effects of Deep Levels, Injection Level, and
Light Trapping on Design and Performance of High Efficiency Solar Cells,
Proceedings of the DOE/Sandia Crystalline Photovoltaic Technology Project Review
Meeting, pp.70-75, July 1989.
36.
A. Rohatgi, C. J. Summers, A. Erbil, R. Sudharsanan, S. A. Ringel, P. V. Meyers, and C. H.
Liu, "Current Status and Future Directions of Cd (Zn,Mn)Te/CdS Solar Cells", Proceedings
of the Polycrystalline Thin Film Program Meeting, Denver, Colorado, pp. 45-50, August
1989.
37.
A. Rohatgi, W. A. Doolittle, and A. W. Smith, "Doping and Oxygen Dependence of
Efficiency of EFG Solar Cells", Proceedings of the 21st IEEE Photovoltaic Specialists
Conference, Orlando, Florida, pp. 561-587, May 1990.
38.
R. Sudharsanan and A. Rohatgi, "Effects of Pre-Heat Treatment of CdS or MOCVD
CdTe/CdS Solar Cell Performance", Proceedings of the 21st IEEE Photovoltaic Specialists
Conference, Orlando, Florida, pp. 504-508, May 1990.
39.
A. W. Smith, A. Rohatgi, and S. C. Neel, "Texture: A Ray Tracing Program for the
Photovoltaic Community", Proceedings of the 21st IEEE Photovoltaic Specialists
Conference, Orlando, Florida, pp. 426-431, May 1990.
40.
W. A. Doolittle, A. Rohatgi, and R. Brenneman, "Correlation Between Impurities, Defects,
and Cell Performance in Semicrystalline Silicon", Proceedings of the 21st IEEE
Photovoltaic Specialists Conference, Orlando, Florida, pp. 681-686, May 1990.
41.
G. Augustine, A. Rohatgi, and N. Jokerst, "Optimization of Base Doping for Radiation Hard
InP Solar Cells", Proceedings of the 3rd Indium Phosphide and Related Materials
Conference Proceedings, Cardiff, Wales, U.K., pp. 60-63, April 1991.
42.
Z. Chen, A. Rohatgi, and P. Sana, "Effects of Illumination Level on Diffusion Length and
Efficiency of Poly-Si Cells", Proceedings of the 22nd IEEE Photovoltaic Specialists
Conference, Las Vegas, Nevada, pp. 1051-1056, October 1991.
43.
B. L. Sopori, K. M. Jones, X. R. Matson, M. Al-Jassim, S. Tsuo, W. A. Doolittle, and A.
Rohatgi, "Hydrogen in Silicon: Diffusion and Defect Passivation", Proceedings of the 22nd
IEEE Photovoltaic Specialists Conference, Las Vegas, Nevada, pp.833-841, October 1991.
41
44.
R. R. King, E. W. Thomas, W. B. Carter, and A. Rohatgi, "The Effect of Aluminum and
Boron Solid-Source Doping on Recombination in Silicon Solar Cells", Proceedings of the
22nd IEEE Photovoltaic Specialists Conference, Las Vegas, Nevada, pp. 229-234, October
1991.
45.
A. Rohatgi, S. A. Ringel, R. Sudharsanan, and H. C. Chou, "An Improved Understanding of
Efficiency Limiting Defects in Polycrystalline CdTe/CdS Solar Cells", Proceedings of the
22nd IEEE Photovoltaic Specialists Conference, Las Vegas, Nevada, pp. 962-966, October
1991.
46.
A. Rohatgi and R. Sudharsanan, "MOCVD of Compound Semiconductors for
Photovoltaics", Proceedings of the 6th International Photovoltaic Science and Engineering
Conference, New Delhi, India, pp. 835-842, February 1992.
47.
G. Augustine, N.M. Jokerst, and A. Rohatgi, "Absorption Measurements of Doped Thin
Film InP for Solar Cell Modeling", Proceedings of the 4th International Conference on
Indium Phosphide Related Materials, New Port, Rhode Island, pp. 557-560, April 1992.
48.
A. Rohatgi, P. Sana, and J. Salami, "Record High Efficiency Solar Cells on Cast
Polycrystalline Silicon", 11th European Photovoltaic Solar Energy Conference, Montreaux,
Switzerland, pp. 159-163, October 1992.
49.
G. Augustine, B.M. Keyes, N.M. Jokerst, A. Rohatgi, and R.K. Ahrenkiel, "Time-Resolved
Photoluminescence Studies on Transferred Thin Film InP Epilayers", to be published in
Proceedings of the 5th International Conference on Indium Phosphide Related Materials, pp.
636-639, Paris, France, April 1993.
50.
P. Sana, A. Rohatgi, J.P. Kalejs, and R.O. Bell, "The Effect of Aluminum Treatment and
Forming Gas Anneal on EFG Silicon Solar Cells," Proceedings of the 23rd IEEE
Photovoltaic Specialists Conference, Louisville, KY, pp. 111-116, May 1993.
51.
H.C. Chou, A. Rohatgi, A.K. Bhat, S. Kamra, R.R. Arya, and R.K. Ahrenkiel, "The Effects
of CdTe Mole Ratio in the MOCVD Growth Ambient on CdTe Solar Cells," Proceedings of
the 23rd IEEE Photovoltaic Specialists Conference, Louisville, KY, pp. 481-485, May 1993.
52.
A. Rohatgi, P. Sana, M.S. Ramanachalam, and W. B. Carter, "Investigation of the Effects of
Aluminum Treatment on Silicon Solar Cells," Proceedings of the 23rd IEEE Photovoltaic
Specialists Conference, Louisville, KY, pp. 52-57, May 1993.
53.
A. Rohatgi, Z. Chen, G. Crotty, and J. Salami, "Gettering and Passivation of High Efficiency
Multicrystalline Silicon Solar Cells," Technical Digest of the 7th International Photovoltaic
Science and Engineering Conference, Nagoya, Japan,
42
pp. 93-97, November 1993.
54.
K. Yasutake, H. Kakiuchi, K. Yoshi, H. Kawabe, Z. Chen, S.K. Pang, and A. Rohatgi,
"Surface Recombination Velocity and Interface State Parameters at Si-Si02 Interface
Prepared by Low Temperature Plasma Processes," Technical Digest of the 7th International
Photovoltaic Science and Engineering Conference, Nagoya, Japan, pp. 549-550, November
1993.
55.
C. Leguijt, P. Lolgen, J.A. Eikelboom, P.H. Amesz, R.A. Steeman, W.C. Sinke, P.M. Sarro,
L.A. Verhoef, P -P. Michiels, Z.H. Chen and A. Rohatgi, "Very Low Surface Recombination
Velocities on 2.5 Ωcm Si Wafers, Obtained with Low-Temperature PECVD of Si-oxide and
Si-nitride," Technical Digest of the 7th International Photovoltaic Science and Engineering
Conference, Nagoya, Japan, pp. 551-552, November 1993.
56.
J.B. Lee, Z. Chen, M.G.Allen, A. Rohatgi and R. Arya, "A High Voltage Solar Cell Array as
an Electrostatic MEMS Power Supply", Proceedings 7th IEEE Workshop on Micro Electro
Mechanical Systems, Oiso, Japan, pp. 331-336, January 1994.
57.
P. Lolgen,, A. Rohatgi, P. Sana, W.C. Sinke, A.W. Weeber, C. Leguijt, R.A. Steeman, and
J.A. Eikelboom, "Al Treatment-Induced Improvement in Bulk Carrier Lifetime Measured
Independently from Surface Effects," Proceedings of the 12th European Photovoltaic Solar
Energy Conference:Proceedings of the International Conference, Amsterdam, The
Netherlands, pp. 1778-1781, April 1994.
58.
C. Leguijt, P. Lolgen, J.A. Eikelboom, A.S.H. van der Heide, R.A. Steeman, W.C. Sinke,
P.M. Sarro, L.A. Verhoef, P.P. Michiels, Z. Chen, and A. Rohatgi, "Surface Passivation of
Silicon by Low Temperature Processing," Proceedings of the 12th European Photovoltaic
Solar Energy Conference: Proceedings of the International Conference, Amsterdam, The
Netherlands, pp. 720-723, April 1994.
59.
J.B. Lee, Z. Chen, M.G. Allen, and A.Rohatgi, "A Hybrid Micro System Using a High
Voltage Solar Cell Array as a Power Supply", Proceedings International Symposium on
Microelectronics ISHM 94, Boston PA, pp. 232-236, November 1994.
60.
B.L. Sopori, X. Deng, J.P. Benner, A. Rohatgi, P.Sana, S. Estreicher, Y.K. Park, and M.A.
Roberson, "Hydrogen in Silicon: Current Understanding of Diffusion and Passivation
Mechanisms," Proceedings of 1994 IEEE First World Conference on
Photovoltaic Energy Conversion: Conference Record of the Twenty-Fourth IEEE
Photovoltaic Specialists Conference, Waikoloa, Hawaii, Vol. II, pp. 1615-1620, December
1994.
61.
H.E. Elgamel, A. Rohatgi, Z. Chen, C. Vinckier, S. Sivoththaman, J. Poortmans, J. Nijs, and
R. Mertens, "Optimal Surface and Bulk Passivation of High Efficiency Multicrystalline
43
Silicon Solar Cells," Proceedings of 1994 IEEE First World Conference on Photovoltaic
Energy Conversion: Conference Record of the Twenty-Fourth IEEE Photovoltaic Specialists
Conference, Waikoloa, Hawaii, Vol. II, pp. 1323-1326, December 1994.
62.
S. Narayanan, J. Creager, S. Roncin, A. Rohatgi, and Z. Chen, "Process Improvements for
Large Area Polycrystalline Silicon Buried Contact Solar Cells Sequence," Proceedings of
1994 IEEE First World Conference on Photovoltaic Energy Conversion: Conference Record
of the Twenty-Fourth IEEE Photovoltaic Specialists Conference, Waikoloa, Hawaii, Vol. II,
pp. 1319-1322, December 1994.
63.
Z. Chen, A.Rohatgi and D. Ruby, "Silicon Surface and Bulk Defect Passivation by Low
Temperature PECVD Oxides and Nitrides," Proceedings of the 1994 IEEE First World
Conference on Photovoltaic Energy Conversion: Conference Record of the Twenty-Fourth
IEEE Photovoltaic Specialists Conference, Waikoloa, Hawaii , Vol. II, pp.1331-1334,
December 1994.
64.
P. Doshi, A.Rohatgi, M.Ropp, Z.Chen, D.Ruby, D.L. Meier, Rapid Thermal Processing of
High Efficiency Silicon Solar Cells with Controlled In-Situ Annealing," Proceedings of
1994 IEEE First World Conference on Photovoltaic Energy Conversion: Conference Record
of the Twenty-Fourth IEEE Photovoltaic Specialists Conference, Waikoloa, Hawaii, Vol. II,
pp. 1299-1302, December 1994.
65.
H.C. Chou, A. Rohatgi, N.M. Jokerst, S. Kamra, S.R. Stock, S.L. Lowrie, R.K. Ahrenkiel,
and D.H.Levi, Approach Toward High Efficiency CdTe/CdS Heterojunction Solar Cells,
submitted for publication in Proceedings of the 1994 International Conference on Electronic
Material, Hsinchi, Taiwan, vol. 43, pp. 178-182, December 1994.
66.
M.Begovic, A. Rohatgi, D. Nall, R. Long, Power Quality and Design of the Photovoltaic
System at Georgia Tech Athletic Facility, Proceedings of the 4th International Conference
on Power Quality, pp. 250-255. August 1995.
67.
A.Rohatgi, P.Doshi, M.Ropp, L.Cai, A. Doolittle, S. Narasimha, T.Krygowski, J.Rand,
D.Ruby, and D.L. Meir, Improved Understanding and Optimization of RTP and PECVD
Processes for High Efficiency Silicon Solar Cells, Proceedings of the 13th
European Photovoltaic Solar Energy Conference and Exhibition, vol. I, pp. 413-416, Nice,
France, October 1995.
68.
M.Begovic, M.Ropp, A.Rohatgi, R.Long, Roof-Installed PV System on the Olympic
Swimming Pool at Georgia Tech, Proceedings of the 13th European Photovoltaic Solar
Energy Conference and Exhibition, vol. I, pp. 965-968, Nice, France, October 1995.
69.
B. L. Sopori, M. Cuzdinovic, C.Khattak and A. Rohatgi, Characterization of HEM MultiCrystalline Silicon Material for High Efficiency Solar Cells, Proceedings of 13th European
44
Photovoltaic Solar Energy Conference and Exhibition, pp. 320-326, October, 1995.
70.
R. Long, A. Rohatgi, M. Begovic, Photovoltaics in Architecture, The Design, Construction
and Monitoring of a Photovoltaic Power System on the Georgia Institute of Technology
Aquatic Center, Proceedings of the 13th European Photovoltaic Solar Energy Conference
and Exhibition, vol. I, pp. 675-678, Nice, France, October, 1995.
71.
P.Doshi, J.Mejia, K.Tate, S.Kamra, A.Rohatgi, S.Narayanan, and R.Singh, High Efficiency
silicon solar Cells by Low Cost Rapid-Thermal Processing Screen Printing and Plasma
Enhanced Chemical Vapor Deposition,” Proceedings of the 25th IEEE Photovoltaic
Specialists Conference, pp.421-424, Washington D.C., May 1996.
72.
T.Krygowski, P.Sana, and A.Rohatgi, A Novel Technology for the Simultaneous Diffusion
of Boron and Phosphorus In Silicon, Proceedings of the 25th IEEE Photovoltaic Specialists
Conference,, pp. 393-396, Washington D.C. May 1996.
73.
S.Narasimha, S.Kamra,A.Rohatgi and C.P.Khattak The Optimization and Fabrication of
High-Efficiency HEM Multicrystalline Silicon Solar Cells, Proceedings of the 25th IEEE
Photovoltaic Specialists Conference, pp. 449-452, Washington D.C., May 1996.
74.
A. Rohatgi, S. Narasimha, S. Kamra, P. Doshi, C.P. Khattak, K. Emery and H. Field Record
High 18.6% Efficient Solar Cell on HEM Multicrystalline Material, Proceedings of the 25th
IEEE Photovoltaic Specialists Conference, pp. 741-744, Washington D.C., May 1996
75.
A.X.Coles, R.A.Gebhardt and A. Rohatgi, Optimization of Porous Silicon Reflectance for
Solar Cell Applications, Proceedings of the Materials Research Society, pp. 1210-1215,
Washington D.C., April, 1996.
76.
R. Wallace, J.I. Hanoka, A. Rohatgi and G. Crotty, Thin Silicon String Ribbon, Proceedings
of the 9th International PV Science and Engineering Conference, Miyazaki, Japan, pp. 8384, November 1996.
77.
R.Singh, A. Rohatgi, and D. Ratokonda, Role of Rapid Isothermal Processing in the
Manufacturing of Bulk and Thin Film Solar Cells and Other Large Area Devices,
Proceedings of the 4th International Conference on Advanced Thermal Processing of
Semiconductors RTP 96, Idaho, pp. 296-299, 1996.
78.
S. Han, L.Cai, G. May, and A. Rohatgi, Optimizing the Growth of PECVD Silicon Nitride
Films for Solar Cells Applications Using Neural Networks and Genetic Algorithms,
Artificial Neural Networks in Engineering, vol. 6, pp. 343-349, St. Louis, Missouri,
November 1996.
79.
S. Han, L.Cai, G.May and A.Rohatgi, Modelling and Optimization of PECVD Silicon
45
Nitride Using Neural Networks and Genetic Algorithms, 190th Meeting of the
Electrochemical Society, pp.1166, San Antonio, Texas, October, 1996.
80.
A. Rohatgi, and S. Narasimha, Design, Fabrication, and Analysis of Greater than 18%
Efficient Multicrystalline Silicon Cells, 9th International Photovoltaic Science and
Engineering Conference, pp. 85-88, Miyazaki, Japan, November 1996.
81.
M. Begovic, M. Ropp, and A.Rohatgi, “Roof-Installed Photovoltaic System at Georgia Tech
Olympic Aquatic Center,” Tesla the Third Millenium, Belgrade, Yugoslavia, October 1417, 1996.
82.
R.L. Wallace, J.I. Hanoka, S. Narasimha, S. Kamra, and A. Rohatgi “String Ribbon Acrystal Growth Method to Make High Efficiency, 100 um Silicon Solar Cells,” 14th
European Photovoltaic Solar Energy Conference and Exhibition, vol. I, pp. 171-174,
Barcelona, Spain, June 30 - July 4, 1997.
83.
M. Ropp, M. Begovic, and A. Rohatgi, “Performance Evaluation of the Georgia Tech
Aquatic Center Photovoltaic Array,” 14th European Photovoltaic Solar Energy Conference
and Exhibition, vol. I, pp.374-379, Barcelona, Spain, June 30 - July 4, 1997.
84.
A. Rohatgi, P. Doshi, and S. Kamra, “Highest Efficiency RTP Silicon Solar Cells by Rapid
Thermal Diffusion and Oxidation,” 14th European Photovoltaic Solar Energy Conference
and Exhibition, vol. I, pp. 660-665, Barcelona (Catalunya), Spain, June, 1997.
85.
R. Singh, R. Sharangpani, K.C. Cherukuri, Y.Chen, D.M. Dawson, K.F. Poole, A. Rohatgi,
S.Narayanan and R.P.S. Thakur, “How Rapid Isothermal Processing Can Be A Dominant
Semiconductor Processing Technology In The 21st Century,” Material Research Society, vol
429, pp. 81-94, San Francisco, CA, April, 1996.
86.
M. Begovic, M. Ropp, A. Rohatgi, S. Durand and A. Rosenthal, “Monitoring and Data
Acquisition For A Large Roof-Mounted Photovoltaic Array,” Proceedings of the IEEE
Region 3 Conference (SECON 97), pp.-297-300, Blacksburg, Virginia, April 1997.
87.
T.F. Ciszek, T.H. Wang, W.A. Doolittle and A. Rohatgi, “Minority-Carrier Lifetime
Degradation in Silicon Co-Doped with Iron and Gallium,” Proceedings of the 26th IEEE
Photovoltaic Specialists Conference, pp. 59-62, Anaheim, California, September, 1997.
88.
R.F.Wallace, J.I. Hanoka, S. Narasimha, S. Kamra and A. Rohatgi, “Thin Silicon Ribbon for
High Efficiency Polycrystalline Solar Cells,” Proceedings of the 26th IEEE Photovoltaic
Specialists Conference, pp. 99-102, Anaheim, California, September, 1997.
89.
S. Narasimha, G. Crotty, T. Krygowski, A. Rohatgi and D.L. Meier, “Back Surface Field
and Emitter Passivation Effects in the Record High Efficiency N-Type Dendritic Web
46
Silicon Solar Cell,” Proceedings of the 26th IEEE Photovoltaic Specialists Conference, pp.
235-238, Anaheim, California, September, 1997.
90.
T. Krygowski and A. Rohatgi, “Simultaneous P and B Diffusion, In-Situ Surface
Passivation, Impurity Filtering and Gettering for High-Efficiency Silicon Solar Cells,”
Proceedings of the 26th IEEE Photovoltaic Specialists Conference, pp. 19-24, Anaheim,
California, September, 1997.
91.
S. Narasimha and A. Rohatgi, “Optimized Aluminum Back Surface Field Techniques for
Silicon Solar Cells,” Proceedings of the 26th IEEE Photovoltaic Specialists Conference, pp.
63-66, Anaheim, California, September, 1997.
92.
P. Doshi, J. Moschner, J. Jeong, A. Rohatgi, R. Singh and S. Narayanan, “Characterization
and Application of Rapid Thermal Oxide surface Passivation for the Highest Efficiency RTP
Silicon Solar Cells,” Proceedings of the 26th IEEE Photovoltaic Specialists Conference, pp.
87-90, Anaheim, California, September, 1997.
93.
M.E. Ropp, M. Begovic and A. Rohatgi, “Determination of the Curvature Derating Factor
for the Georgia Tech Aquatic Center Photovoltaic Array,” Proceedings of the 26th IEEE
Photovoltaic Specialists Conference, pp. 1297-1300, Anaheim, California, September, 1997.
94.
W.A. Doolittle, A. Rohatgi, R. Ahrenkiel, D. Levi, G. Augustine and R.H. Hopkins,
“Understanding the Role of Defects in Limiting the Minority Carrier Lifetime in SiC,”
Proceedings of the Materials Research Society Semiconductor Materials and Devices
Symposium, pp. 197-202, Boston, MA, December, 1997.
95.
K. Li, Z.C.Feng, A.T.S. Wee, H.C. Chou, J.Y. Lin, S. Kamra, K.L. Tan, A. Rohatgi, L. Zhou
and S.F,Y. Li, “Several Efficiency Influencing Factors in CdTe/CdS Solar
Cells,” Proceedings of the Fall Material Research Conference, Boston, MA, December,
1997.
96.
J. Moschner, P. Doshi, D.S. Ruby, T. Lauinger, A.G. Aberle and A. Rohatgi, “Comparison
of Front and Back Surface Passivation Schemes for Silicon Solar Cells,” Proceedings of the
2nd World Conference and Exhibition on Photovoltaic Solar Energy Conversion, pp. 12141219, Hofburg Kongresszentrum, Wien, Austria, July, 1998.
97.
M. Begovic, M. Ropp, and A. Rohatgi, “Determining the Likelihood of Islanding of PV
Systems by Modelling and Statistical Analysis, Proceedings of the 2nd World Conference
and Exhibition on Photovoltaic Solar Energy Conversion,” pp. 1310-1315, Hofburg
Kongresszentrum, Wien, Austria, July, 1998.
98.
D.L. Meier, H.P. Davis, P.D. Meier, A.Shibata, B.J. Meier, T.Abe, K.Kinoshita, C. Bishop,
S.Mahajan, A.Rohatgi, P.Doshi, and M. Finnegan, “Self-Doping Contacts and Associated
47
Silicon Solar Cell Structures,” Proceedings of the 2nd World Conference and Exhibition on
Photovoltaic Solar Energy Conversion, pp. 1320-1325, Hofburg Kongresszentrum, Wien,
Austria, July 6-10, 1998.
99.
A. Rohatgi and S. Narasimha, “Effective Passivation of the Low Resistivity Silicon Surface
by a Rapid Thermal Oxide/PECVD Silicon Nitride Stack and its Application to Passivated
Rear and Bifacial Si Solar Cells,” Proceedings of the 2nd World Conference and Exhibition
on Photovoltaic Solar Energy Conversion, Hofburg Kongresszentrum, Wien, Austria, July 610, 1998.
100.
G. Augustine, H. McD. Hobgood, V. Balakrishna, G.T. Dunne, R.H. Hopkins, R.N.
Thomas, W.A. Doolittle and A. Rohatgi, “High Purity and Semi-Insulating 4H-SiC Crystals
Grown by Physical Vapor Transport,” Proceedings of the Materials Science Forum, vols.
264-268, pp. 9-12, Switerzerland, 1998.
101.
A. Rohatgi, P. Doshi, A. Ebong, S. Narasimha, T. Krygowski and J. Moschner, “Rapid
Processing of Low-Cost, High-Efficiency Silicon Solar Cells,” Proceedings of the IUMRSICA International Conference in Asia, vol. 22, no.#3, pp. 383-390, May 1999.
102.
A. Ebong, J. Brody, A. Rohatgi and T. Williams, “Optimization of Front Metal Contact
Firing Scheme to Achieve High Fill Factors on Screen Printed Silicon Solar Cells,” In
Technical Digest, 9th International Photovoltaic Science and Engineering Conference,
pp. 765-766, September, 1999.
103.
D.L. Meier, H. P. Davis, R. A. Garcia, J. Salami, A. Rohatgi, A. Ebong, P. Doshi and M.
Finnegan, “Aluminum Alloy Back-p-n Junction Dendritic Web Silicon Solar Cell,”
Proceedings of the 11th International Photvoltaic Science and Engineering Conference
(PVSEC-11), pp. 765-766, September, 1999.
104.
A. Rohatgi, “Rapid Thermal Processing of High Performance Dielectrics and Silicon Solar
Cells,” Symposium on Advances in Rapid Thermal Processing, dielectrics Science and
Technology Society Proceedings, vol. 99-10, pp. 265-276, Seattle, Washington, May, 1999.
105.
H.A. Atwater, B. Sopori, T. Ciszek, L.C. Feldman, J. Gee, A. Rohatgi, “Research
Opportunities in Crystalline Silicon Photovoltaics for the 21st Century, Seattle, Washington,
May, 3-6, 1999.
106.
R. Singh, A. Rohatgi, K. Rajan, S. Venkataraman, and K.F. Poole, “Rapid Thermal
Processing as a Photovoltaic Manufacturing Technology for the 21st Century,” Proceeding of
the ECS Symposium, PV for the 21st Century, vol. 99-11, pp. 33-47, Seattle, Washington,
May 3 - 6, 1999.
107.
T. Saitoih, H. Hashigami, X. Wang, T. Abe, T. Igarshi, S. Glunz, S. Rein, W. Wettling, A.
48
Ebong, B.M. Damiani, A. Rohatgi, I. Yamasaki, T. Nunoi, H. Sawai, H. Ohtuka, T.
Warabisako, J. Zhao, M. Green, J. Schmidt, A. Cuevas, A. Metz and R. Hezel, “Suppresion
of Light-Induced Degradation of Minority-Carrier Lifetimes in Low-Resistivity CZ Silicon
Wafers and Solar Cells, Proceedings of the 16th European Photovoltaic Solar Energy
Conference and Exhibition,” vol. 2, pp.1423-1428, Glasgow, United Kingdom, May, 2000.
108.
A. Rohatgi, A. Ebong, V. Yelundur and A. Ristow, “Rapid Thermal Processing of Next
Generation Silicon Solar Cells”, Proceedings of the 10th International Workshop on the
Physics of Semiconductor Devices, vol. 1, pp. 73-80, New Delhi, India, December 14-18,
2001.
109.
A. Ebong, M. Hillali and A. Rohatgi, “Rapid Photo-Assisted Forming Gas Anneal (FGA)
for High Quality Screen-Printed Contacts for Silicon Solar Cells,” Proceedings of the 28th
IEEE PVSC, pp. 264-267, Anchorage, Alaska, September 15-22, 2000.
110.
M. Begovic, A. Pregelij, and A. Rohatgi, “Four-Year Performance Assessment of the 342
KW PV System at Georgia Tech,” Proceedings of the 28th IEEE PVSC, pp. 1575-1578,
Anchorage, Alaska, September 15-22, 2000.
111.
A. Rohatgi, V. Yelundur, J. Jeong, A. Ebong, D. Meier, A.M. Gabor, and M. Rosenblum,
“Aluminum Enhanced PECVD SiNx Hydrogenation in Silicon Ribbons,” Proceedings of the
16th European Photovoltaic Solar Energy Conference and Exhibition, vol. 2, pp. 1120-1123,
Glasgow, United Kingdom, May 1-5, 2000.
112.
V. Yelundur, A. Rohatgi, A.M. Gabor, J. I. Hanoka, and R.L. Wallace “PECVD SiNx
Induced Defect Passivation in String Ribbon,” Proceedings of the 28th IEEE Photovoltaic
Specialists Conference, pp. 91-94, Anchorage, Alaska, September 15-22, 2000.
113.
R. Ludemann, B.M. Damiani, A. Rohatgi, “Novel Processing of Solar Cells with Porous
Silicon Texturing,” Proceedings of the 28th IEEE Photovoltaic Specialists Conference,
pp. 299-301, Anchorage, Alaska, September 15-22, 2000.
114.
B.M. Damiani, R. Ludemann, D.S. Ruby, S.H. Zaidi, A. Rohatgi, “Development of RIETextured Silicon Solar Cells,” Proceedings of the 28th IEEE Photovoltaic Specialists
Conference, pp. 371-374, Anchorage, Alaska, September 15-22, 2000.
115.
D. S. Ruby, S.H. Zaidi, B.M. Damiani, and A. Rohatgi, “RIE-Texturing of Multicrystalline
Silicon Solar Cells,” Proceedings of the 12th International PVSEC Conference, vol. 74, pp.
133-137, Cheju Island, Korea, June 11-15, 2001.
116.
J. Jeong, A. Rohatgi, M. Rosenblum and J. Kalejs, “Lifetime Enhancement in EFG
Multicrystalline Silicon,” Proceedings of the 28th IEEE Photovoltaic Specialists
Conference, pp. 83-86, Anchorage, Alaska, September 15-22, 2000.
49
117.
A. Ebong, Y.H. Cho, M. Hilali, A. Rohatgi and D. Ruby, “Rapid Thermal Technologies for
High Efficiency Silicon Solar Cells,” Proceedings of the 12th International PVSEC
Conference, vol. 74, pp. 51-55, Cheju Island, Korea, June 11-15, 2001.
118.
A. Rohatgi, V. Yelundur, J. Jeong, A. Ebong, M.D. Rosenblum, R.L. Wallace,
“Fundamental Understanding and Implementation of Al-Enhanced PECVD SiNx
Hydrogenation in Silicon Ribbons,” Proceedings of the 12th International PVSEC
Conference, vol. 74, pp. 117-126, Cheju Island, Korea, June 11-15, 2001.
119.
M. Begovic, A. Pregelj, A. Rohatgi, and D. Novesel, “Impact of Renewable Distributed
Generation on Power Systems,” Proceedings of the 34th Hawaii International Conference on
System Sciences, 2001.
120.
M. Begovic, A. Pregelj, and A. Rohatgi, “On Impact of Distributed Generation on Feeder
Operation,” Proceedings of the 32nd North American Power Symposium (NAPS), Waterloo,
2000.
121.
A. Rohatgi, A. Ebong, M. Hilali, C. Honsberg and D. L. Meier, “High Efficiency Selfaligned Self-Doping Selective Emitter Screen-Printed Silicon Solar Cells,” Proceedings of
the 17th European Photovoltaic Solar Energy Conference and Exhibition, vol. 1, Munich,
Germany, October 22-26 2001.
122.
A. Ristow, A. Ebong, M. Hilali and A. Rohatgi, “Screen-Printed Back Surface Reflector for
Light Trapping in Crystalline Silicon Solar Cells,” Proceedings of the 17th European
Photovoltaic Solar Energy Conference and Exhibition, pp.1335-1338, Munich, Germany,
October 22-26, 2001.
123.
M. Begovic, A. Pregelj, and A. Rohatgi, “Estimation of PV System Reliability Parameters,”
Proceedings of the 17th European Photovoltaic Solar Energy Conference and Exhibition,
pp.558-561, Munich, Germany, October 22-26, 2001.
124.
S. Bowden and A. Rohatgi, “Rapid and Accurate Determination of Series Resistance and
Fill Factor Losses in Industrial Silicon Solar Cells,” Proceedings of the 17th European
Photovoltaic Solar Energy Conference and Exhibition, vol. 2, pp. 1802-1806, Munich,
Germany, October 22-26, 2001.
125.
M. Begovic, A. Rohatgi, A. Pregelj and C. Honsberg “Green Pricing” of Electric Power:
Status and Perspectives, submitted for publication IEEE proceedings
126.
A. Rohatgi, V. Yelundur, J. Jeong, A. Ristow, M. Hilali, and B. Damiani “Recent Advances
and Approach Toward Low-Cost High-Efficiency Multicrystalline Silicon
Solar Cells,” Proceedings of the 11th International Workshop on Physics of
50
Semiconductor Devices, vol.1, pp. 73-80, New Delhi, India, December 2001.
127.
A. Rohatgi, M. Hilali, D.L. Meier, A. Ebong, C. Honsberg, A.F. Carroll and P. Hacke, “SelfAligned Self-Doping Selective Emitter for Screen-Printed Silicon Solar Cells,” Proceedings
of the 17th European Solar Energy Conference, vol 2, pp. 1307-1310, Munich, Germany,
2001.
128.
J. Brody and A. Rohatgi, “Comparison of Dielectric Surface Passivation of Monocrystalline
and Multicrystalline Silicon,” Proceedings of the 29th IEEE Photovoltaic Specialists
Conference, New Orleans, Louisiana, May 20-24, 2002.
129.
B. Damiani, M. Hilali, and A. Rohatgi, “Light Induced Degradation in Czochralski Silicon
During Illuminated High Temperature Processing,” Proceedings of the 29th IEEE
Photovoltaic Specialists Conference, New Orleans, Louisiana, May 20-24, 2002.
130.
M. Hilali, J.W. Jeong, A. Rohatgi, D.L. Meier and A.F. Carroll, “Optimization of SelfDoping Ag Paste Firing to Achieve High Fill Factors on Screen-Printed Silicon Solar Cells
with 100/sq. Emitter,” Proceedings of the 29th IEEE Photovoltaics Specialists Conference,
New Orleans, Louisiana, May 20-24, 2002.
131.
J.W. Jeong, Y.H. Cho, A. Rohatgi, M.D. Rosenblum, B.R. Bathey, J.P. Kalejs, “Rapid
Thermal Processing for PECVD SiN-Induced Hydrogenation of High-Efficiency EFG
Silicon Solar Cells,” Proceedings of the 29th IEEE Photovoltaics Specialists Conference,
New Orleans, Louisiana, May 20-24, 2002.
132.
A. Ristow and A. Rohatgi, “Design Rules for the Reduction of the Influence of Material
Quality on the Performance of Crystalline Silicon Solar Cells,” Proceedings of the 29th IEEE
Photovoltaics Specialists Conference, New Orleans, Louisiana, May 20-24, 2002.
133.
S. Bowden, V. Yelundur and A. Rohatgi, “Implied Voc and Suns Voc Measurements in
Multicrystalline Solar Cells,” Proceedings of the 29th IEEE Photovoltaic Specialists
Conference, New Orleans, Louisiana, May 20-24, 2002.
134.
A. Pregelj, M. Begovic, A. Rohatgi, “Impact of Inverter Configuration on PV System
Reliability and Energy Production,” Proceedings of the 29th IEEE Photovoltaic Specialists
Conference, New Orleans, Louisiana, May 20-24, 2002.
135.
S. Bowden, D.S. Kim, C. Honsberg, and A. Rohatgi, “Rapid Thermal Processing For Front
And Rear Contact Passivation,” Proceedings of the 29th IEEE Photovoltaic Specialists
Conference, New Orleans, Louisiana, May 20-24, 2002.
136.
T. Saitoh, X. Wang, H. Hashigami, T. Abe, T. Igarashi, S. Glunz, W. Wettling, A. Ebong, B.
Damiani and A. Rohatgi, “Research and Development of Stabilized High-Efficiency CA Si
51
Solar Cells,” Proceedings of the 11th PVSEC, Sapporo, Japan 1999.
137.
R. Ludemann, G. Willeke, B.M. Damiani and A. Rohatgi, “Silicon Solar Cells with Black
Silicon Texturization,” Proceeding of the 7th European Solar Energy Conference, vol. 2, pp.
1327-1330, Munich, Germany, 2001.
138.
A. Rohatgi, V. Yelundur, J.W. Jeong, M. Hilali and D.S. Kim, “Rapid Thermal Processing
Enhanced Hydrogenation and Screen-Printed Contacts in Silicon Ribbon Solar Cells,”
Proceedings of the National Center for Photovoltaics and Solar Program Review , Denver,
Colorado, March 24-26, 2003.
139.
V. Meemongkolkiat, M. Hilali and A. Rohatgi, “Investigation of RTP and Belt Fired Screen
Printed Al-BSF on Textured and Planar Back Surfaces of Silicon Solar Cells,” Proceedings
of the 3rd World Conference on Photovoltaic Energy Conversion, Volume B, pp. 1467-1470,
May 11-18, 2003, Osaka, Japan.
140.
D.S. Kim, A.M. Gabor, V. Yelundur, A.D. Upadhyaya, V. Meemongkolkiat and A. Rohatgi,
“String Ribbon Silicon Solar Cells with 17.8% Efficiency,” Proceedings of the 3rd World
Conference on Photovoltaic Energy Conversion, Volume B, pp. 1293-1296,May 11-18,
2003, Osaka, Japan.
141.
A. Rohatgi, V. Yelundur, J-W. Jeong, D.S. Kim and A.M. Gabor, “Implementation of Rapid
Therman Processing to Achieve Greater than 15% Efficient Screen-Printed Ribbon Silicon
Solar Cells,” Proceedings of the 3rd World Conference on Photovoltaic Energy Conversion,
Volume B, pp 1352-1355, May 11-18, 2003, Osaka, Japan.
142.
B. Damiani, K. Nakayashiki, D.S. Kim, V. Yelundur, S. Ostapenko, I. Tarasov and A.
Rohatgi, “Light Induced Degradation In Promising Multi-Crystalline Silicon Materials for
Solar Cell Fabrication,” Proceedings of the 3rd World Conference on Photovoltaic Energy
Conversion, Volume A, pp. 927-930, May 11-18, 2003, Osaka, Japan.
143.
A. Rohatgi, “Road to Cost-Effective Crystalline Silicon Photovoltaics,” Proceedings of the
3rd World Conference on Photovoltaic Energy Conversion, Volume A, pp 829-834, May 1118, 2003, Osaka, Japan.
144.
A. Rohatgi, A. Ristow and V. Yelundur, “Cost and Technology Roadmaps for CostEffective Silicon Photovoltaics,” Proceedings of 12th International Workshop on the Physics
of Semiconductor Devices (IWPSD-2003), vol. 2, pp. 892-897, December 16-20, 2003, New
Delhi, India.
145.
V. Yelundur, A. Rohatgi and J.I Hanoka, “Beneficial Impact of Low-Frequency PECVD
SiNx:H-induced Hydrogenation in High-Efficiency String Ribbon Silicon Solar Cells,”
Proceedings of the 19th European Photovoltaic Solar Energy Conference and Exhibition,
52
June 7-11, 2004, Paris, France.
146.
M. Hilali, A. Rohatgi, C. Kahadilkar, S. Kim, T. Pham, J. Salami, A. Shaikh and S.
Sridharan, “Development of Thick-Film Ag Paste to Achieve High Fill Factor in ScreenPrinted Si Solar Cells with Low-and High-Sheet Resistance Emitter,” Proceedings of the
19th European Photovoltaic Solar Energy Conference and Exhibition, June 7-11, 2004,
Paris, France.
147.
A. Upadhyaya, M. Sheoran, A. Rohatgi and K. Matthei, “Record High Efficiency ScreenPrinted Belt Co-Fired Cells on Cast Multicrystalline Silicon,” Proceeding of the 19th
European Photovoltaic Solar Energy Conference and Exhibition, June 7-11, 2004, Paris,
France.
148.
K. Nakayashiki, D. S. Kim, A. Rohatgi, B. R. Bathey, “Understanding of the RTP-assisted
Reduction of Hydrogen Dissociation from Defects in EFG Si,” Proceedings of 14th
International Phtovoltaic Science and Engineering Conference, vol. 2, pp 643-644, January
26-30, 2004, Chulalongkorn University, Bangkok, Thailand.
149.
V. Meemongkolkiat, M. Hilali, K. Nakayashiki, and A. Rohatgi, “Process and Material
Dependence of Al-BSF in Crystalline Si Solar Cells,” Proceedings of 14th International
Phtovoltaic Science and Engineering Conference, vol. 1, pp. 401-402. January 26-30, 2004,
Chulalongkorn University, Bangkok, Thailand.
150.
J. Brody, P. Geiger, G. Hahn and A. Rohatgi, “Comparison of Dielectrics and Iodine
Solution for Monocrystalline and Multicrystalline Surface Passivation,” Proceedings of the
3rd World Conference on Photovoltaic Energy Conversion, Volume B, pp 1490-1492, May
11-18, 2003, Osaka, Japan.
151.
M. Stavola, Fan Jiang, A. Rohatgi, D. Kim, J. Holt, H. Atwater and J. Kalejs,
“Hydrogenation of Si From SiNx:H Films: How Much Hydrogen is Really in the Silicon?,”
Proceedings of the 3rd World Conference on Photovoltaic Energy Conversion, Volume A, pp
909-912, May 11-18, 2003, Osaka, Japan.
152.
A. Rohatgi, D. S. Kim, V. Yelundur, K. Nakayashiki, A. Upadhyaya, M. Hilali, V.
Meemongkolat, “Record-High-Efficiency Solar Cells on Multicrystalline Materials Through
Understanding and Implementation of RTP-Enhanced SiNx-induced Defect Hydrogenation,”
Proceedings of 14th International Photovoltaic Science and Engineering Conference, vol. 2,
pp. 635-638, January 26-30, 2004, Chulalongkorn University, Bangkok, Thailand.
153.
A. Ristow, M. Begovic and A. Rohatgi, “Numerical Approach to Uncertainty and Sensitivity
Analysis in Forecasting the Manufacturing Cost and Performance of PV Modules,”
Proceedings of the 19th European Photovoltaic Solar Energy Conference and Exhibition, pp
2178-2181, June 7-11, 2004, Paris, France.
53
154.
M. Hilali, A. Rohatgi, C. Kahadilkar, S. Kim, T. Pham, J. Salami, A. Shaikh and S.
Sridharan, “Understanding and Development of AG Pastes for Silicon Solar Cells with High
Sheet-Resistance Emitters”, Proceedings of the 19th European Photovoltaic Solar Energy
Conference and Exhibition, pp 1300-1303, June 7-11, 2004, Paris, France.
155.
J. M. Gee, P. Hacke, M. Sumner, R. Schmit and A. Rohatgi, “Towards a Manufacturable
Back-Contact Emitter-Wrap-Through Silicon Solar Cell,” Proceedings of the 31st IEEE
Photovoltaic Specialists Conference, January 3-7, 2005, Orlando, Florida.
156.
T.H. Wang, M.R. Page, E. Iwaniczko, Q. Wang, D.H. Levi, Y. Yan, C.W. Teplin,
V.Yelundur, A. Rohatgi and H.M. Branz, “Effective Interfaces in Silicon Heterojunction
Solar Cells,” Proceedings of the 31st IEEE Photovoltaic Specialists Conference, January 3-7,
pp. 955-958, 2005, Orlando, Florida.
157.
M. Hilali, K. Nakayashiki and A. Rohatgi, “A Study of Screen-Printed Textured Cells with
High Sheet-Resistance Emitter,” Proceedings of the 31st IEEE Photovoltaic Specialists
Conference, pp 1185-1188, January 3-7, 2005, Orlando, Florida.
158.
G. Crabtree, T. Jester, C. Fredric, J. Nickerson, V. Meemongkolkiat and A. Rohatgi,
“Production Viability of Gallium Doped Mono-Crystalline Solar Cells,” Proceedings of the
31st IEEE Photovoltaic Specialists Conference, January 3-7, 2005, pp, 935-938, Orlando,
Florida.
159.
K. Nakayashiki, A. Rohatgi, I. Tarasov, S. Ostapenko, L. Gedvilas, B. Keyes, B.R. Bathey
and J.P. Kalejs, “Investigation of Spatially Non-Uniform Defect Passivation in EFG Si by
Scanning Photoluminescence Technique,” Proceedings of the 31st IEEE Photovoltaic
Specialists Conference, pp. 1265-1268, January 3-7, 2005, Orlando, Florida.
160.
A. Ebong, M. Hilali, V. Upadhyaya, B. Rounsaville, I.Ebong and A. Rohatgi, “High
Efficiency Screen-Printed Planar Solar Cells on Single Crystalline Silicon Materials,”
Proceedings of the 31st IEEE Photovoltaic Specialists Conference, pp 1173-1176, January 37, 2005, Orlando, Florida.
161.
M.Hilali, K. Nakayashiki, A. Ebong and A. Rohatgi, “Investigation of High-Efficiency
Screen-Printed Textured Si Solar Cells with High Sheet-Resistance Emitters,” Proceedings
of the 31st IEEE Photovoltaic Specialists Conference, pp. 1185-1188, January 3-7, 2005,
Orlando, Florida.
162.
V. Meemongkolkiat, K. Nakayashiki, A. Rohatgi, G. Crabtree, J. Nickerson and T.L. Jester,
“The Effect of The Variation in Resistivity and Lifetime on the Solar Cells Performance
Along the Commercially Grown GA- and B-Doped Czochralski Ingots,” Proceedings of the
31st IEEE Photovoltaic Specialists Conference, pp. 1115-1118, January 3-7, 2005, Orlando,
Florida.
54
163.
A. Upadhyaya, M. Sheoran and A. Rohatgi, “Study of Direct PECVD SiNx-Induced Surface
Emitter and Bulk Defect Passivation in P-Type Silicon Solar Cells,” Proceedings of the 31st
IEEE Photovoltaic Specialists Conference, pp. 1273-1276, January 3-7, 2005, Orlando,
Florida.
164.
V. Meemongkolkiat, K. Nakayashiki, D.S. Kim, S. Kim, A. Shaikh and A. Rohatgi,
“Investigation of Modified Screen-Printing Al pastes for Local Back Surface Field
Formation,” Proceedings of the 4th IEEE World Conference on Photovoltaic Energy
Conversion, pp 1338-1341, May 7-12, 2006, Waikoloa, Hawaii.
165.
M. Sheoran, A.Upadhyaya, D.S. Kim and A. Rohatgi, “Investigation of the Effect of
Resistivity and Thickness on the Performance of Cast Multicrystalline Silicon Solar Cells,”
Proceedings of the 4th IEEE World Conference on Photovoltaic Energy Conversion, pp
1308-1311, May 7-12, 2006, Waikoloa, Hawaii.
166.
D.S. Kim, V. Meemongkolkiat, A. Ebong, B. Rounsaville, V. Upadhyaya, A.Das and A.
Rohatgi, “2D-Modeling and Development of Interdigitated Back Contact Solar Cells on
Low-Cost Substrates,” Proceedings of the 4th IEEE World Conference on Photovoltaic
Energy Conversion, pp 1417-1420, May 7-12, 2006, Waikoloa, Hawaii.
167.
A. Upadhyaya, M. Sheoran, A. Ristow and A. Rohatgi, “Greater Than 16% Efficient Screen
Printed Solar Cells on 115-170 µm Thick Cast Multicrystalline Silicon,” Proceedings of the
4th IEEE World Conference on Photovoltaic Energy Conversion, pp 1052-1055, May 7-12,
2006, Waikoloa, Hawaii.
168.
A. Ebong, V. Upadhyaya, B. Rounsaville, D.S. Kim, K. Tate and A. Rohatgi, “18% Large
Area Screen-Printed Solar Cells on Textured MCz Silicon with High Sheet Resistance
Emitter,” Proceedings of the 4th IEEE World Conference on Photovoltaic Energy
Conversion, pp 1326-1329, May 7-12, 2006, Waikoloa, Hawaii.
169.
A. Ebong, V. Upadhyaya, B. Rounsaville, D.S. Kim and A. Rohatgi, “Rapid Thermal
Processing of High Efficiency N-Type Silicon Solar Cells with Al Back Junction”
Proceedings of the 4th IEEE World Conference on Photovoltaic Energy Conversion, pp
1376-1379, May 7-12, 2006, Waikoloa, Hawaii.
170.
A. Rohatgi, M. Hilali, A. Ristow, V. Meemongkolkiat, A. Upadhyaya, K. Nakayashiki, V.
Yelundur and A. Ebong, “Opportunities and Challenges in Crystalline Silicon
Photovoltaics,” International Workshop on The Physics of Semiconductor Devices,
December 13-17, 2005, New Delhi, India.
171.
A. Ristow, M. Begovic and A. Rohatgi, “Modeling the Effects of Uncertainty and Reliability
on the Cost of Energy from PV Systems,” Proceedings of the 20th European Photovoltaic
55
Solar Energy Conference and Exhibition, pp 4317-4321, June 6-10, 2005.
172.
A. Ebong, V. Yelundur, V. Upadhyaya, B. Rounsaville, A. Upadhyaya, K. Tate, A. Rohatgi
and J. Kalejs, “A Comprehensive Study of the Performance of Silicon Screen-Printed Solar
Cells Fabricated with Belt Furnace Emitters,” Proceedings of the 20th European Photovoltaic
Solar Energy Conference and Exhibition, pp 1194-1197, June 6-10, 2005.
173.
V. Yelundur, K. Nakayashiki, A. Rohatgi, G. Crabtree, J. Nickerson and T.L. Jester, “The
Effect of the Variation in Resistivity and Lifetime on the Solar Cells Performance Along the
Commercially Grown Ga- and B-Doped Czochralski Ingots,” Proceedings of the 31st IEEE
Photovoltaic Specialists Conference, Lake Buena Vista, Florida, 2005, pp. 1115-1118.
174.
V. Yelundur, K. Nakayashiki, M. Hilali and A. Rohatgi, “Implementation of a
Homogeneous High-Sheet-Resistance Emitter in Multicrystalline Silicon Solar Cells”, 31st
IEEE Photovoltaic Specialists Conference, pp. 959-962, 2005 (oral).
175.
A. Rohatgi, A. Ebong, M. Hilali, V. Meemongkolkiat, B. Rounsaville and A. Ristow,
“High-Efficiency Screen-Printed Solar Cells on Textured Monocrystalline Silicon”,
Proceedings of the 15th International Photovoltaic Science and Engineering Conference, pp.
517-520, 2005.
176.
M. Begović, S. Ghosh, and A. Rohatgi, “Georgia Tech roof-mounted photovoltaic array: ten
years of experience,” 4th World Conference on Photovoltaic Energy Conversion, Hawaii,
USA, pp. 2383-2386, 2006.
177.
A. Ebong, D.S. Kim, V. Yelundur, A. Upadhyaya, B. Rounsaville, V. Upadhyaya, K. Tate,
and A. Rohatgi, “Understanding the role of forming gas on the screen-printed crystalline
silicon solar cell front grid contacts,” 21st European Photovoltaic Solar Energy Conference,
Dresden, Germany, pp. 1519-1522, 2006.
178.
A. Ebong, W. Zhang, P. Bokalo, and A. Rohatgi, “Development of a low temperature silver
paste for high efficiency screen-printed solar cells,” 21st European Photovoltaic Solar Energy
Conference, Dresden, Germany, pp. 1224-1227, 2006.
179.
A. Upadhyaya, A. Ebong, D.S. Kim, V. Yelundur, V. Upadhyaya, B. Rounsaville, K. Tate,
and A. Rohatgi, “High efficiency mono-crystalline solar cells with simple manufacturable
technology,” 21st European Photovoltaic Solar Energy Conference, Dresden, Germany, pp.
1307-1310, 2006.
180.
D.S. Kim, A. Das, K. Nakayashiki, B. Rounsaville, V. Meemongkolkiat, and A. Rohatgi,
“Silicon solar cells with boron back surface field formed by using boric acid,” 22nd European
Photovoltaic Solar Energy Conference, Milan, Italy, 2007.
56
181.
A. Ebong, B. Rounsaville, A. Upadhyaya, V. Upadhyaya, D.S. Kim, V. Yelundur, K. Tate,
A. Rohatgi, and W. Zhang, “Understanding the role of glass frit content in the Ag paste for
high sheet resistance emitters,” 22nd European Photovoltaic Solar Energy Conference, Milan,
Italy, 2007.
182.
A. Ebong, K. Nakayashiki, V. Upadhyaya, A. Rohatgi, B.R. Bathey, M.D. Rosenblum, J.
Salami, and A. Shaikh, “Screen-printed solar cells on less than 200 µm thick EFG sheet
silicon,” 22nd European Photovoltaic Solar Energy Conference, Milan, Italy, 2007.
183.
A. Ristow and A. Rohatgi, “Analytical model to determine the efficiency premium for highefficiency photovoltaic modules,” 22nd European Photovoltaic Solar Energy Conference,
Milan, Italy, 2007.
184.
V. Meemongkolkiat, D.S. Kim, and A. Rohatgi, “SiO2-based spin-on dielectrics for back
surface passivation of p-type Si solar cells,” 22nd European Photovoltaic Solar Energy
Conference, Milan, Italy, 2007.
185.
M. Sheoran, A. Upadhyaya, V. Upadhyaya, and A. Rohatgi, “High-efficiency screen-printed
thin silicon solar cells,” 22nd European Photovoltaic Solar Energy Conference, Milan, Italy,
2007.
186.
A. Das, V. Meemongkolkiat, A. Ristow, and A. Rohatgi, “Conductive silver colloids for
light trapping in crystalline silicon solar cells with rear local contacts,” 17th International
Photovoltaic Science and Engineering Conference, Fukuoka, Japan, 2007.
PAPERS IN CONFERENCE PROCEEDINGS (Non-refereed)
1.
R. Sudharsanan, S. Perkowitz, and A. Rohatgi, "Characterization of Thin CdMnTe Films by
Infrared Spectroscopy" (Abstract), Bulletin of the American Physical Society, vol. 33, pg.
398, 1988.
2.
R. Sudharsanan, K. T. Pollard, A. Erbil, and A. Rohatgi, "MOCVD Growth of CdTe and
CdMnTe Films for Photovoltaic Applications," Fourth Biannual Workshop on
Organometallic Vapor Phase Epitaxy, Monterey, California, pp. 8-11,1989.
3.
A. Rohatgi, "Effect of Oxygen on Silicon Solar Cells," Sunshine Workshop Science and
Engineering Conference, pp. 73-76, Kyoto, Japan, November 1990.
4.
A. Rohatgi, "High Efficiency Polycrystalline Silicon Solar Cells", Proceedings of the 4th
Sunshine Workshop on Crystalline Silicon Solar Cells, pp. 67-75, Chiba, Japan, November
57
1992.
5.
A. Rohatgi, P. Sana, Z. Chen, J. Salami, and G.Crotty, "Silicon Photovoltaic Research at
Georgia Tech," Proceedings of the Sixth Sunshine Workshop on Crystalline Silicon Solar
Cells, pp. 35-54, Tokyo, Japan, November 1993.
6.
Z.C. Feng, A. Rohatgi, A.T.S. Wee, Z.C. Feng, H.C. Chou, S. Kamra and A. Rohatgi,
Optical and Surface Analysis of Bulk 6H-SiC Single Crystalline Wafers, Bull Am. Physics.
Soc. Vol. 40, No. 1, pp.219, 1995.
7.
S. Narasimha, J. Mejia, and A. Rohatgi, Screen Printed Aluminum Back Surface Fields for
Silicon Solar Cells, Sixth Workshop on the Role of Impurities and Defects in Silicon Device
Processing, Snow Mass, Colorado, August 12-14, 1996.
8.
T. Krygowski, and A. Rohatgi, A Simultaneous Front and Back Diffusion Technique for the
Low Cost Production of High Efficiency Silicon Solar Cells, Sixth Workshop on the Role of
Impurities and Defects in Silicon Device Processing, Snow Mass, Colorado, August 12-14,
1996.
9.
A. Rohatgi and S. Narasimha, “High-Efficiency Cell Fabrication on Low-Defect Density
Materials,” Sixth Workshop on the Role of Impurities and Defects in Silicon Device
Processing, Snow Mass, Colorado, August 12-14, 1996.
10.
A. Rohatgi, S. Narasimha and L. Cai, “Gettering and Passivation of High Efficiency
Multicrystalline Silicon Solar Cells,” American Institute of Physics Conference Proceedings,
November,1996.
11.
T. Krygowski and A. Rohatgi “Simultaneous P and B Diffusion, In-Situ Surface Passivation,
Impurtiy Filtering and Gettering for High-Efficiency Silicon Solar Cells,” 26th IEEE
Photovoltaic Specialists Conference, Anaheim, California, September 29 - October 3, 1997.
12.
A. Rohatgi, “Designs and Fabrication Technologies for Future Commerical Crystalline Si
Solar Cells”, 15th Workshop on Crystalline Silicon Solar Cells and Modules: Materials and
Processes, 2005.
CONFERENCE PRESENTATION WITHOUT PROCEEDINGS
1.
A. B. Dewald, J. P. Schaffer, and A. Rohatgi, "A Characterization of Defects in
Semiconductors Using Positron Annihilation Spectroscopy," Fall TMS-AIME Meeting,
Cincinnati, Ohio, October 1987.
58
2.
A. B. Dewald, R. Frost, S. A. Ringel, J. P. Schaffer, A. Rohatgi, B. Nielson, and K. G. Lynn,
"Positron Annihilation Spectroscopy (PAS) of AlGaAs/GaAs Interfaces in MOCVD-Grown
GaAs Heterojunction Solar Cells," 34th AVS National Symposium, Anaheim, California,
November 2-5, 1987.
3.
R. L. Frost, A. B. Dewald, Jr., J. P. Schaffer, A. Rohatgi, B. Nielson, and K. G. Lynn, "Slow
Positron Annihilation Spectroscopy of Hetero and Homo Junctions of
GaAs Based Semiconductor Thin Films," 15th International Conference on Metallurgical
Coatings, San Diego, California, April 11-15, 1988.
4.
J. P. Schaffer, A. Rohatgi, T. K. Gupta, and W. D. Straub, "Grain Boundary Characterization
of ZnO Varistors by PAS, DLTS, and FTIR Measurements," 90th Annual Meeting of the
American Ceramic Society, Cincinnati, Ohio, May 1-5, 1988.
5.
A. Rohatgi and S. A. Ringel, "Characterization and Modeling of High-Efficiency GaAs
Heteroface Solar Cells," Joint Crystalline Cell Research and Concentrating Collector
Projects Review Meeting, Sandia National Laboratories, Albuquerque, New Mexico, July
19-21, 1988.
6.
A. Rohatgi and A. W. Smith, "Modeling and Analysis of High Efficiency Silicon Cells,"
Joint Crystalline Cell Research and Concentrating Collector Projects Review Meeting,
Sandia National Laboratories, Albuquerque, New Mexico, July 19-21, 1988.
7.
R. Sudharsanan, Z. C. Feng, S. Perkowitz, A. Rohatgi, K. T. Pollard, and A. Erbil,
"Characterization of MOCVD-Grown CdMnTe Films by Infrared, Raman, and
Photoluminescence Spectroscopy," 35th National Symposium of the American Vacuum
Society, Atlanta, Georgia, October 2-7, 1988.
8.
T. K. Gupta, W. D. Straub, M. S. Ramanachalam, J. P. Schaffer, and A. Rohatgi, "Grain
Boundary Defect-Identification in ZnO Varistor by Positron Annihilation Spectroscopy",
91st Annual Meeting of the American Ceramic Society, Indianapolis, Indiana, April 23-27,
1989.
9.
A. Rohatgi, "Recent Trends in Photovoltaics", NSF Workshop on Research Needs in Power
System Operations and Planning, Atlanta, Georgia, September 5-8, 1989.
10.
A. Rohatgi, "CdTe and ZnTe Based Solar Cells", DOE Peer Review of Photovoltaic
Research, Denver, Colorado, October 1989.
11.
A. Rohatgi, "High Efficiency Silicon Solar Cells", DOE Peer Review of Photovoltaic
Research, Denver, Colorado, October 1989.
59
12.
S. A. Ringel, R. Sudharsanan, A. Rohatgi, M. S. Owens, and H. P. Gillis, "Effects of
Annealing and Surface Preparation on the Properties of MBE-Grown Polycrystalline Films",
36th National Symposium of the American Vacuum Society, Boston, Massachusetts,
October 23-27, 1989.
13.
A. B. Dewald and A. Rohatgi, “Slow Positron Annihilation Spectroscopy and High
Resolution Electron Microscopy of Cobalt and Nickel Silicide Thin Films Grown on
Single Crystal Silicon", 36th National Symposium of the American Vacuum Society,
Boston, Massachusetts, October 23-27, 1989.
14.
A. Rohatgi, "High Efficiency Silicon Solar Cells", DOE Crystalline Photovoltaic
Technology Project Review Meeting, August 1990.
15.
A. Rohatgi, "Growth and Process Optimization for High Efficiency CdTe and CdZnTe Solar
Cells", Advanced R&D Review Meeting, Solar Energy Research Institute, Lakewood,
Colorado, October 1990.
INVITED CONFERENCE PRESENTATIONS
1.
A. Rohatgi, "Application of DLTS Technique to Study Junctions and Interfaces", presented
at the International Conference on Vacuum-Surfaces-Thin Films, New Delhi, India,
December 1979.
2.
A. Rohatgi, "Approaches to High Efficiency Solar Cells", presented at the 6th Photovoltaic
and Research and Development Conference, Golden, Colorado, October 1984.
3.
A. Rohatgi, "A Review of High Efficiency Single Crystalline Silicon Solar Cells", presented
at the 18th IEEE Photovoltaic Specialists Conference, Las Vegas, Nevada, October 20,
1985.
4.
A. Rohatgi, "High Efficiency Silicon Solar Cells - Opportunity and Challenge", presented at
the 1985 SPIE - The International Society for Optical Engineering, Crystal City, Virginia,
April 11, 1985.
5.
A. Rohatgi, "Status and Directions for High Efficiency Silicon Solar Cell Research",
presented at the 7th Photovoltaic Advanced Research and Development Meeting at Solar
Energy Research Institute, Golden, Colorado, May 1986.
6.
A. Rohatgi, "Review of High Efficiency Silicon Solar Cells," 26th Meeting of the Solar
Array Project at Jet Propulsion Laboratory, Pasadena, California, May 1986.
7.
A. Rohatgi, "A Review of High Efficiency Cells", 1986 SPIE - The International Society for
60
Optical Engineers, Boston, Massachusetts, September 1986.
8.
A. Rohatgi, "Status of High Efficiency Photovoltaic Cells", IEEE Power Engineering
Society Meeting, Atlanta, Georgia, January 1987.
9.
A. Rohatgi, "Material Requirements and Technology Assessment for High Efficiency
Silicon Solar Cells", 2nd International Workshop on Silicon Solar Cells, Schliersee, West
Germany, September 1987.
10.
A. Rohatgi, J. P. Schaffer, and A. B. Dewald, Jr., "Defect Characterization in
Semiconductors by Positron Annihilation Spectroscopy", 17th Meeting of the
Electrochemical Society, Chicago, Illinois, October 9-14, 1988.
11.
A. Rohatgi, "Recent Trends in Photovoltaics", International Conference on Semiconductor
Materials, New Delhi, India, December 1988.
12.
A. Rohatgi, "Changing Outlook for Polycrystalline Materials", EPRI Photovoltaic Cell and
Module Technology Status Workshop, Denver, Colorado, June 1989.
13.
A. Rohatgi, "Effect of Oxygen on Lifetime and Performance of Single and Silicon Solar
Cells", Third Sunshine Workshop on Crystalline Silicon Solar Cells, Mishima, Japan,
November 1990.
14.
A. Rohatgi, "Opportunities in Silicon Photovoltaics and its Integration with
Micro-electronics," Hong Kong University of Science and Technology, August 1991.
15.
A. Rohatgi, "MOCVD of Compound Semiconductors for Photovoltaics," 6th Photovoltaic
Science and Engineering Conference, New Delhi, India, April 1992.
16.
A. Rohatgi, "Opportunity and Challenge in Silicon Photovoltaics," DOE Workshop on
Photovoltaic Materials: Innovations and Fundamental Research Opportunities, Vail,
Colorado, July 1992.
17.
A. Rohatgi, "Approach Toward High Efficiency Polycrystalline Silicon Solar Cells," Fourth
Sunshine Workshop on Crystalline Solar Cells, Chiba, Japan, November 1992.
18.
A. Rohatgi, "Opportunities and Challenges in Polycrystalline Silicon Solar Cells," 7th
Photovoltaic Science and Engineering Conference, Nagoya, Japan, 1993.
19.
A. Rohatgi, "Approach Toward High Efficiency Polycrystalline Silicon Solar Cells," Indiana
University of Pennsylvania Department of Physics Colloquium Series Spring 1993, Indiana,
PA, March 1993.
61
20.
A. Rohatgi, "Effects of Al Gettering and Forming Gas Anneal on Multicrystalline Silicon
Solar Cells," 3rd Joint Defect Workshop Organized by DOE/NREL, Vail, Colorado, August
1993.
21.
A. Rohatgi, "Silicon Photovoltaic Research at Georgia Tech," Sixth Sunshine Workshop on
Crystalline Silicon Solar Cells, Tokyo, Japan, November 1993.
22.
A. Rohatgi, "Gettering and Passivation of High Efficiency Multicrystalline Silicon Solar
Cells," Sixth International Photovoltaic Science and Engineering Conference, Nagoya,
Japan, November 1993.
23.
A. Rohatgi, "High Efficiency Multicrystalline Silicon Solar Cells," First European
Community Workshop on Silicon Solar Cells, Madrid, Spain, April 1994.
24.
A. Rohatgi, "High Efficiency Single and Multicrystalline Silicon Cells," Fraunhofer-Institut
fur Solaire Energiesysteme, Freiburg, Germany, April 1994.
25.
A. Rohatgi, "Gettering and Passivation of High Efficiency Multicrystalline Silicon Solar
Cells," IMEC, Leuven, Belgium, April 1994.
26.
A. Rohatgi, "Effects of PECVD and Al Treatments on the Silicon Solar Cell Efficiency," 4th
Workshop on the Role of Point Defects/Defect Complexes in Silicon Device Processing,
Beaver Creek, Colorado, June 1994.
27.
M. Begovic, R. Long, and A. Rohatgi, “An Update on the Olympic Natatorium
Photovoltatic System,” IEEE Engineering Society (Georgia Tech Student Chapter), Atlanta,
November 1994.
28.
A. Rohatgi, “Photovoltaics - An Environmentally Clean Energy Option for the Next
Generation,” IEEE Power Engineering Society (Atlanta Chapter), Atlanta, February 1995.
29.
A. Rohatgi, “Photovoltaics - An Environmentally Clean Energy Option for the Next
Generation,” DOE/National Geographic Kids Network Summer Institute, Atlanta, July
1995.
30.
A. Rohatgi, “Photovoltaics - An Environmentally Clean Energy Option for the Next
Generation,” The 1995 Annual Meeting of the World Future Society, Atlanta, July 1995.
31.
C. Khattak, B.L.Sopori, M.Cuzdinovic, and A.Rohatgi, “Characterization of HEM MultiCrystalline Silicon Material For High Efficiency Solar Cells” 5th Workshop on the Role of
Impurities and Defects in Silicon Device Processing, Copper Mountain, Colorado,August
1995.
62
32.
T. Krygowski, P.Doshi, L.Cai,A.Doolittle, and A.Rohatgi, “Application of PECVD for Bulk
and Surface Passivation of High Efficiency Silicon Solar Cells,” 5th Workshop on the Role
of Impurities and Defects in Silicon Device Processing, Copper Mountain, Colorado, August
1995.
33.
A. Rohatgi, “Low-Cost High Efficiency Solar Cells: An Environmentally Clean Energy
Option for the Next Generation,” Physics Colloquium at the University of Texas Tech,
Lubbock, Texas, April 1996.
34.
A. Rohatgi and S. Narasimha, “High-Efficiency Cell Fabrication on Low-Defect Density
Materials,” Sixth Workshop on the Role of Impurities and Defects in Silicon Device
Processing, Snow Mass, Colorado, August 12-14, 1996.
35.
A. Rohatgi, S. Narasimha and S. Kamra, “Design, Fabrication and Analysis of Greater Than
18% Efficient Multicrystalline Silicon Cells,” 9th International Photovoltaic Science and
Engineering Conference, Miyazaki, Japan, November 1996.
36.
A. Rohatgi, “High Efficiency Multicrystalline Silicon Solar Cells: Status, Opportunities &
Challenge,” The Sunshine Workshop on Crystalline Silicon Solar Cells, Tokyo, Japan,
November, 1996.
37.
A. Rohatgi, “Pushing the Frontiers of Silicon PV Technologies: Novel Approaches to HighEfficiency, Manufacturable, Silicon Cells” First Conference on Future Generation
Photovoltaic Technologies, Denver, Colorado, March 24-26, 1997.
38.
A. Rohatgi, “The Effects of Rapid Pre-Getter Anneal Treatments on the Performance of
Cast mc-Si Solar Cells,” Seventh Workshop on the Role of Impurities and Defects in
Silicon, Vail, Colorado, August 10-13, 1997.
39.
A. Rohatgi, “Applied Research and Exploratory Development,” National Center for PV
Workshop on PV Program Strategic Directions, Lakewood, Colorado, July 14-15-1997.
40.
T. Krygowski and A. Rohatgi, “A Simultaneously Diffused Textured, In-Situ Oxide ARCoated Solar Cell Process for High Efficiency Silicon Solar Cells,” The 26th IEEE
Photovoltaic Specialists Conference, Anaheim, California, September 29 - October 3, 1997.
41.
A. Rohatgi, P. Doshi, and S. Kamra, “Highest Efficiency RTP Silicon Solar Cells by Rapid
Thermal Diffusion and Oxidation,” 14th European Photovoltaic Solar Energy Conference
and Exhibition, Barcelona (Catalunya), Spain, June 30 - July 4, 1997.
42.
A. Rohatgi, “Solar Power: Clean Electricity for the 21st Century,” Georgia Tech’s Student
Chapter of the IEEE Power Engineering Society, November 13, 1997.
63
43.
A. Rohatgi, S. Narasimha, P. Doshi, A. Ebong and S. Kamra, “Understanding and
Development of Low-Cost Rapid Processing Technologies for High Efficiency Silicon Solar
Cells,” 2nd World Conference and Exhibition on Photovoltaic Solar Energy Conversion,
Vienna, Austria, July 6-10, 1998.
44.
A. Rohatgi, S. Narasimha, P. Doshi, J. Moschner, and D.S. Ruby, “A Rapid Thermal
Oxide/PECVD Silicon Nitride Stack for Effective Passivation of Low Resistivity Silicon
and Phosphorus Diffused Emitter,” Eighth Workshop on the Role of Impurities and Defects
in Silicon, Copper Mountain, Colorado, August 17-19, 1998.
45.
P. Doshi, A. Rohatgi, A. Ebong, and S. Narasimha, “Recent Progress in Rapid Thermal
Processing of Silicon Photovoltaic Devices,” Eighth Workshop on the Role of Impurities
and Defects in Silicon, Copper Mountain, Colorado, August 17-19, 1998.
46.
A. Ebong, V. Yelundur and A. Rohatgi, “Effective Surface and Bulk Defect Passivation of
Low Resistivity Multi-Crystalline Silicon by Annealed RTO/PECVD SiN Stack,” Copper
Mountain, Colorado, August 17-19, 1998.
47.
V. Yelundur, A. Ebong, S. Kamra, A. Rohatgi, J. Hanoka and A. Gabor, “Approach
Towards High Efficiency, Manufacturable Thin String Ribbon Silicon Solar Cells,” Eighth
Workshop on the Role of Impurities and Defects in Silicon, Copper Mountain, Colorado,
August 17-19, 1998.
48.
A. Rohatgi, P. Doshi, A. Ebong, S. Narasimha, T. Krygowski and J. Moschner, “Rapid
Processing of Low-Cost, High-Efficiency Silicon Solar Cells,” Proceedings of the IUMRSICA International Conference in Asia, October, 13-16, 1998.
49.
A. Rohatgi, “Rapid Thermal Processing of High Performance Dielectrics and Silicon Solar
Cells,” Proceedings of the ECS Symposium, PV for the 21st Century, Seattle, Washington,
May 3 - 6, 1999.
50.
A. Ebong, “Gettering, Hydrogenation and Resistivity Dependence of Minority Carrier
Lifetime in Dendritic Web Ribbon Silicon,” 9th Workshop on Crystalline Silicon
Solar Cell Materials & Processes, Breckenridge, Colorado, August 9 - 11, 1999.
51.
J. Jeong, “Aluminum-Enhanced PECVD SiN Hydrogenation of Defects In Edge-Defined
Film-Fed Grown (EFG) Multicrystalline Silicon,” 9th Workshop on Crystalline Silicon Solar
Cell Materials & Processes, Breckenridge, Colorado, August 9 - 11, 1999.
52.
V. Yelundur, “Understanding and Optimization of Manufacturable Defect Gettering
and Passivation Treatments on String Ribbon Silicon,” 9th Workshop on Crystalline Silicon
Solar Materials & Processes, pp. 223-227, Breckenridge, Colorado, August 9 - 11, 1999.
64
53.
B. Damiani, A. Ebong, and A. Rohatgi, “Reduced Light Induced Degradation in Low
Oxygen Boron Doped Mcz and Highe Oxygen Doped Ga Doped Cz Screen Printed Silicon
Solar Cells,” 11th Workshop on Light Degradation of Carrier Lifetimes in CZ-Si Solar Cells,
International Joint Research, Sapporo, Japan, September 20-24, 1999.
54.
A. Rohatgi, A. Ebong, V. Yelundur and A. Ristow, “Rapid Thermal Processing of Next
Generation Silicon Solar Cells,” Proceedings of the 10th International Workshop on the
Physics of Semiconductor Devices, New Delhi, India, pp. 14-18, 1999.
55.
A. Rohatgi, V. Yelundur, J. Jeong, A. Ristow, and A. Ebong, “Advances In Low-Cost
Multicrystalline Silicon Solar Cell Processing In The Last Decade,” 10th Workshop on
Crystalline Silicon Solar Cell Materials and Processes, pp. 12-20, Copper Mountain,
Colorado, August 14-16, 2000.
56.
B.M. Damiani, A.H. Ristow, A. Ebong, and A. Rohatgi, “Reduction of Light Induced
Degradation in Cxochralski Silicon Solar Cells By Optimization of Cell Design
Parameters,” 10th Workshop On Crystalline Silicon Solar Cell Materials and Processes,
Copper Mountain, pp. 194-199, Colorado, August 14-16, 2000.
57.
V. Yelundur, J. Jeong, A. Rohatgi, M.D. Rosenblum, and R.L. Wallace, “Understanding and
Optimization of Al-Enhanced SiN Induced Defect Passivation In Ribbon Silicon,” 10th
Workshop On Crystalline Silicon Solar Cell Materials and Processes, pp. 228-233, Copper
Mountain, Colorado, August 14-16, 2000.
58.
A. Ebong, M. Hilali, A. Rohatgi, D. Meier and D.S. Ruby, “Belt Furnace Gettering and
Passivation of N-Web Silicon For High Efficiency Screen-Printed Front Surface Field Solar
Cells,” 10th Workshop On Crystalline Silicon Solar Cell Materials and Process, Copper
Mountain, Colorado, August 14-16, 2000.
58.
A. Rohatgi, V. Yelundur, and J. Jeong, “Lifetime Enhancement and Low-Cost Technology
Development for High Efficiency Manufacturable Silicon Solar Cells,” Proceedings of the
11th Workshop on Crystalline Silicon Solar Cell Materials and Processes, pp. 80-84, August
2001.
59.
J. Brody, A. Rohatgi, and A. Ristow, “Guidelines for More Accurate Determination and
Interpretation of Effective Lifetime from Measured Quasi-Steady-State Photoconductance,”
Proceedings of the 11th Workshop on Crystalline Silicon Solar Cell Materials and Processes,
pp. 163-167, August 2001.
60.
B. Damiani, M. Hilali, and A. Rohatgi, “Light Induced Degradation in Manufactrurable
Multi-Crystalline Silicon Solar Cells,” Proceedings of the 11th Workshop on Crystalline
Silicon Solar Cell Materials and Processes, pp. 229-234, August 2001.
61.
M. Hilali, B. Damiani, and A. Rohatgi, “Lifetime Enhancement During Processing of Porous
65
Silicon Cells,” Proceedings of the 11th Workshop on Crystalline Silicon Solar Cell
Materials and Processes, pp. 235-239, August 2001.
62.
A. Rohatgi “Photovoltaics Research, Education, and Collaboration Program at Georgia
Tech,” Proceedings of the DOE Peer Review Meeting, July, 2001.
63.
A. Rohatgi, V. Yelundur, J. Jeong, A. Ebong, M.D. Rosenblum, R.L. Wallace, A
Fundamental Understanding and Implementation of Al-Enhanced PECVD SiNx
Hydrogenation in Silicon Ribbons,” Proceedings of the 12th International PVSEC
Conference, Cheju Island, Korea, June 11-15,2001.
64.
A. Rohatgi, V. Yelundur, J. Jeong, A. Ristow, M. Hilali, and B. Damiani, “Recent Advances
and Approach Toward Low-Cost High-Efficiency Multicrystalline Silicon Solar Cells,”
Proceedings of the 11th International Workshop on Physics of Semiconductor Devices, New
Delhi, India, Vol. 1., pp. 73-80, Dec. 11-16, 2001.
65.
A. Rohatgi, V. Yelundur, J. Jeong, “High-Efficiency Screen Printed Silicon Ribbon Cells
Through Process-Induced Hydrogenation and Gettering,” Proceedings of the NCPV Program
Review Meeting, pp.159-160, 2001.
66.
A. Rohatgi, V. Yelundur, J.W. Jeong, M. Hilali and D.S. Kim, “Rapid Thermal Processing
Enhanced Hydrogen Screen-Printed Contacts in Silicon Ribbon Solar Cells,” NCPV and
Solar Program Review Meeting, March 24-26, Denver, CO 2003.
67.
A. Ristow and A. Rohatgi, “A Monte Carlo Approach For Assessing The Impact Of
Material And Process Variables On Solar Cell Performance And Manufacturing Cost,”
Proceedings of 13th Workshop on Crystalline Silicon Solar Cell Materials and Processes
Conference, August 10-13, Vail, Colorado, 2003.
68.
D.S. Kim, K. Nakayashiki, V. Yelundur, B. Rounsaville, A. Rohatgi, A.M. Gabor, B.R.
Bathey and J.P. Kalejs, “Record High Efficiency Solar Cells on EFG 18.2% and String
Ribbon 17.8% Silicon by Rapid Thermal Thermal Processing,” Proceedings of 13th
Workshop on Crystalline Silicon Solar Cell Materials and Processes Conference, August 1013, Vail, Colorado, 2003.
69.
I. Tarasov, M. Dybiec, S. Ostapenko, A. Rohatgi, V. Yelundur and A.M. Gabor,
“Improvement of Electronic Quality in Mc-Si Wafers with SiNx:H Layer After Rapid
Thermal Processing Accessed by Scanning Photoluminescence,” Proceedings of 13th
Workshop on Crystalline Silicon Solar Cell Materials and Processes Conference, August
10-13, Vail, Colorado, 2003.
70.
A. Rohatgi, A. Ristow and V. Yelundur, “Cost and Technology Roadmaps for CostEffective Silicon Photovoltaics,” Proceedings of 12th International Workshop on the Physics
66
of Semiconductor Devices (IWPSD-2003), vol. 2, pp. 893-898, December 16-20, 2003,
New Delhi, India.
71.
A. Rohatgi, D. S. Kim, V. Yelundur, K. Nakayashiki, A. Upadhyaya, M. Hilali, V.
Meemongkolat, “Record-High-Efficiency Solar Cells on Multicrystalline Materials Through
Understanding and Implementation of RTP-enhanced SiNx-induced Defect Hydrogenation,”
Proceedings of 14th International Photovoltaic Science and Engineering Conference,
January 26-30, 2004, Chulalongkorn University, Bangkok, Thailand.
72.
M. Hilali, B. To, A. Rohatgi, “A Review and Understanding of Screen-Printed Contacts and
Selective-Emitter Formation,” Proceedings of 14th Workshop on Crystalline Silicon Solar
Cell Materials and Processes Conference, August 8-11, Winter Park Mountain, Colorado,
2004.
73.
V. Meemongkolkiat, K. Nakayashiki, D.S. Kim and A. Rohatgi, “Factors that Limit the
Formation of an Uniform and Thick Screen-Printed Al-Back Surface Field,” Proceedings of
14th Workshop on Crystalline Silicon Solar Cell Materials and Processes Conference,
August 8-11, Winter Park Mountain, Colorado, 2004.
74.
M.Stavola, W.Tang, F. Jiang, V. Yelundur, A. Rohatgi, G. Hahn, and J. Kalejs,
“Introduction of H into Si as Characterized by IR Spectroscopy,” Proceedings of 14th
Workshop on Crystalline Silicon Solar Cell Materials and Processes Conference, August 811, Winter Park Mountain, Colorado, 2004.
75.
T.H. Wang, M.R. Page, E. Iwaniczko, D. Levi, Y.Yan, H.M. Branz, V. Yelundur, A.
Rohatgi, G. Bunea, A. Terao and Q. Wang, “Toward Better Understanding and Improved
Performance of Silicon Heterojunction Solar Cells,” Proceedings of the 14th Workshop on
Crystalling Silicon Solar Cell Materials and Processes Conference, August 8-11, Winter
Park Mountain, Colorado, 2004.
76.
S. He, S. Danyluk, A. Rohatgi, A. Upadhyaya, V. Yelundur, I. Tarasov and S. Ostapenko,
“Near Infrared Photoelasticity of Polycrystalline Silicon and it’s Relation to Solar Cell
Process,” Proceedings of the 14th Workshop on Crystalling Silicon Solar Cell Materials and
Processes Conference, August 8-11, Winter Park Mountain, Colorado, 2004.
77.
A. Upadhyaya, K. Nakayashiki, M. Hilali, A. Rohatgi, J.P. Kalejs, B. Bathey, and K.
Matthei, “Record High Efficiency Screen-Printed Belt Co-Fired Cells on EFG Si Ribbon
(16.1%) and HEM Mc-Si (16.9).” Proceedings of the 13th Workshop on Crystalline Si Solar
Cell Materials and Processes, Vail, Colorado, 2003, pp. 215-218.
78.
A. Ebong, V. Meemongkolkiat, M. Hilali, V. Upadhyaya, B. Rounsaville, I. Ebong, A.
Rohatgi, G. Crabtree, J. Nickerson, and T.L. Jester, “Variation of Screen-Printed Solar Cell
Performance Along Commercially Grown GA and B-Doped Czochralski Ingots,”
Proceedings of the 14th Workshop on Crystalline Silicon Solar Cell Materials and Processes,
67
Colorado, 2004.
79.
A. Ebong, M. Hilali, B. Rounsaville and A. Rohatgi “Approach Towards 20% Efficient
Screen-Printed Crystalline Silicon Solar Cells”, 15th Workshop on Crystalline Silicon Solar
Cells and Modules: Materials and Processes, 2005.
80.
M. Sheoran, A. Upadhyaya, A. Rohatgi, D.E. Carlson and M. Narayanan, “High Efficiency
Thin Multicrystalline Silicon Solar Cells”, 15th Workshop on Crystalline Silicon Solar Cells
and Modules: Materials and Processes, 2005.
81.
V. Meemongkolkiat, K. Nakayashiki, B.C. Rounsaville and A. Rohatgi, “Effect of Oxygen
on the Quality of Al-BSF in Si Cells”, 15th Workshop on Crystalline Silicon Solar Cells and
Modules: Materials and Processes, 2005.
82.
B.C. Rounsaville, K. Nakayashiki, V. Yelundur, D.S. Kim and A. Rohatgi, “Over 18%
Efficiency Solar Cells on String Ribbon Silicon by Rapid Thermal Processing”, 15th
Workshop on Crystalline Silicon Solar Cells and Modules: Materials and Processes, 2005.
83.
T.H. Wang, M.R. Page, E. Iwancizko, Y.Xu, Q. Wang, Y.Yan, D. Levi, V. Yelundur, L.
Roybal, R.Bauer, A. Rohatgi and H.M. Branz, “Progress in the use of Hot-Wire CVD ASi;H as Emitters and Collections in Silicon Heterojunction Solar Cells”, 15th Workshop on
Crystalline Silicon Solar Cells and Modules: Materials and Processes, (Invited) 2005.
84.
A. Rohatgi, M. Hilali, A. Ristow, V. Meemongkolkiat, A. Upadhyaya, K. Nakayashiki,
V.Yelundur and A. Ebong”Opportunities and Challenges in Crystalline Silicon
Photovoltaics”, 13th International Workshop on the Physics of Semiconductor, (Invited)
2005.
85.
B. Sopori, K. Jones, R. Reedy, A. Rohatgi and V. Yelundur, “Dynamics of HydrogenationInduced Defects in Si during Solar Cell Processing”, Materials Research Society Spring
Meeting, 2005.
86.
V. Yelundur, S. Hegedus, U.Das, M. Burrows, A. Rohatgi and R. Birkmire, “Thin Film Si
Bottom Cells for High-Efficiency Polycrystalline Tandem Cells”, DOE Solar Energy
Technologies Program Review Meeting, 2005.
87.
A. Rohatgi, V. Yelundur, A. Ristow, M. Hilali, and A. Ebong, “Development and
Understanding of High-Efficiency Solar Cells on Low Cost Silicon Materials”, DOE Solar
Energy Technologies Program Review Meeting, (Invited) 2005.
88.
A. Rohatgi, V. Yelundur, K. Nakayashiki and A. Ebong, “Development of Hydrogen Bulk
Defect Passivation and Screen-Printed Contacts on High Sheet Resistance Emitters for LowCost High-Efficiency Silicon Solar Cells”, DOE Solar Energy Technologies Program
68
Review Meeting, 2005.
INVITED TALKS AND PRESENTATIONS
1.
A. Rohatgi, “Status, Opportunities and Challenges in Silicon Photovoltaics,” University of
San Francisco at Berkeley, March 23, 2005, San Francisco, California.
2.
A. Rohatgi, “Road to Cost Effective Solar Electricity: A Solution to the Energy and
Environmental Problems,” Cornell University, College of Engineering, September 8, 2005,
Ithaca, New York.
3.
A. Rohatgi, “Solar Cells Short Course,” Indian Institute of Technology, December 30, 2005,
Kanpur, India.
4.
A. Rohatgi, M. Hilali, A. Ristow, V. Meemongkolkiat, A. Upadhyaya, K. Nakayashiki, V.
Yelundur and A. Ebong, “Opportunities and Challenges in Crystalline Silicon
Photovoltaics,” International Workshop on The Physics of Semiconductor Devices,
December 13-17, 2005, New Delhi, India.
5.
A. Rohatgi, M. Hilali, A. Ristow, V. Meemongkolkiat, A. Upadhyaya, K. Nakayashiki, V.
Yelundur and A. Ebong “Future Direction of Cost Effective Crystalline Silicon
Photovoltaics,” 2nd Workshop on the Future Direction of Photovoltaics, Tokyo, Japan
March 2, 2006.
PATENTS AND PATENT DISCLOSURE AWARDS
1.
A. Rohatgi, P. Rai-Choudhury, J.R. Gigante, R. Singh, and S.J. Fonash, "Use of Hydrogen
Ion Beam for Low Temperature Processing of Low Leakage, Shallow Junction Ion
Implanted Devices", U.S. Patent 4,522,657, 1985.
2.
W.A. Doolittle and A. Rohatgi, "A Novel Computer Based Pseudo-Logarithmic
Capacitance/Conductance DLTS System - ROI #1249 "DLTS", U.S. Patent 5,521,839, 1996.
3.
Z.Chen, A.Rohatgi, “Method for Low Temperature Plasma Enhanced Chemical Vapor
Deposition (PECVD) of an Oxide and Nitride Antireflection Coating on Silicon,” U.S.
Patent #5,418,019, 1995.
4.
Z. Chen, A. Rohatgi, “Method for passivating Silicon Devices at Low Temperature to
Achieve Low Interface State Density and Low Recombination Velocity While Preserving
Carrier Lifetime,” U.S. Patent #5,462,898, 1995.
69
5.
R.K. Feeney, D.R. Hertling, and A. Rohatgi, “Time Varying Electrical Conductivity Tester
Using Frequency Discrimination and Power Detector and Methods,” U.S. Patent #5495170,
February 1996.
6.
A. Rohatgi, Z. Chen, P. Doshi, K.Tate, J.Mejia, “Processes for Producing Low Cost High
Efficiency Silicon Solar Cells,” U.S. Patent 5,510,271, April 1996.
8.
R.K. Feeney, A. Rohatgi and D.R. Hertling, “Electrical conductivity Tester and Methods
Thereof For Accurately Measuring Time-Varying And Steady State Conductivity Using
Phase Shift Detection,” U.S. Patent #5,508, 610, April 1996.
9.
A. Rohatgi, T. Krygowski, “Arrangement, Dopant Source and Method for Making
Photovoltaic Cells,” U.S. Patent #5,972,784
10.
A. Rohatgi, Z. Chen, P. Doshi, “Processes for Producing Low Cost High Efficiency Silicon
Solar Cells,” U.S. Patent #5,766,964, June, 1998. A. Rohatgi and R.B. Campbell, "Contact
System for Semiconductor Devices", RES 79-118; R&D Disclosure Award plus NASA
Certificate of Recognition, 1979.
11.
A. Rohatgi, J. Bartko and J.R. Davis, "Techniques for Radiation Hardening Devices
Sensitive to Displacement Damage", RES 80-298; Disclosure Award, 1980.
12.
J. Bartko, R.C. Smith, and A. Rohatgi, "The Fabrication of Optimized Solar Cells", RES
80-386; Disclosure Award, 1980.
13.
R.G. Seidensticker, P. Rai-Choudhury, R.H. Hopkins and A. Rohatgi, "A Method for
Growing High Purity Silicon Dendritic Web for Solar Cell Applications", RES 81-110;
Disclosure Award, Westinghouse Trade Secret Acknowledgement Certificate, 1981.
14..
M.R. Chin and A. Rohatgi, "Low Temperature Growing of Oxinitride", RES 83-068;
Disclosure Award, 1983.
15.
A. Rohatgi, "Annealing Process Induced Radiation Damage", RES 82-346, Disclosure
Award, 1982.
16.
A. Rohatgi, S. Dutta, P. Rai-Choudhury, and R.G. Seidensticker, "Twin Plane Assisted
Internal Gettering in Dendritic Web Silicon", RES 83-124, 1983.
17.
A. Rohatgi, P. Rai-Choudhury, and D.W. Whitson, "Chlorine Implantation to Improve
Break-down Voltage, Radiation Hardness and Thermal Stability of MOS Devices", RES
84-330, 1984.
18.
A. Rohatgi, R.A. Hoffman, T.W. O'Keefe, R.B. Campbell, and P. Rai-Choudhury,
70
"Development of ZnSe + MgF2 + Double Layer AR Coating and Aluminum Back Surface
Reflection for High Efficiency Dendritic Web Silicon Solar Cells", RES 85-124, 1985.
19.
A. Rohatgi, R.B. Campbell and P. Rai-Choudhury, "High Efficiency Solar Cell Designs
Using Doped Polysilicon Layers - A Novel Approach", Disclosure Award plus NASA
Recognition Certificate, 1986.
20.
A. Rohatgi, "Development of Coatings for Efficient Solar Cells", NASA Patent Disclosure
Award and Recognition Certificate, 1987.
21.
A.W. Smith and A. Rohatgi, "Texture: A Ray Tracing Program for Textured Surfaces", a
code for assessing light trapping in textured semiconductors, Georgia Tech Research
Corporation, copyright 1991.
22.
W.J. Lackey,A. Rohatgi, A. Smith, B.N. Beckloff, S. Narashima, “Low Cost, Thin Film
Solar Cells Prepared by Chemical Vapor Deposition of Titanium Diboride and Silicon,”
Disclosure Award, 1995.
23.
A. Rohatgi, H. Mehta and N.G. Hingorani, "Grid Contact Self Inversion Layer Cells," U.S.
Patent application filed, 1994.
24.
A. Rohatgi, J.W. Jeong, V. Yelundur, K. Nakayashiki, D.S. Kim, “ Rapid Firing
Enhancement Al_BSF Contact and SiN Induced Hydrogenation, Patent Invention
Disclosure, 2004.
25.
M. Ropp, A. Rohatgi, M. Begovic, “Systems and Methods for Preventing Islanding of GridConnected Electrical Power Systems,” U.S. Patent 6,429,546.
26.
A. Rohatgi, D.S. Kim, K. Nakayashiki, B. Rounsaville, “Boron Diffusion in Silicon
Devices,” patent application #062012-1120.
27.
A. Rohatgi, A. Ebong, V. Yelundur, “Silicon Solar Cells and Methods of Fabrication,”
patent application #62020-1780.
28.
A. Rohatgi, “Design and Development of 18-20% Efficient Czochralski Monocrystalline Si
Solar Cells, Invention Disclosure Form, April, 2004
29.
A. Rohatgi D.S. Kim, K. Nakayshiki, B. Rounsaville, “Development of Boron Diffusion
Process for Silicon Devices, Invention Disclosure Form, November 2004.
30.
A. Rohatgi, D.S. Kim, K. Nakayashiki, B. Rounsaville, “Systems and Methods for Disabling
Recording Features of Cameras,” Invention Disclosure Form, December, 2005.
71
31.
A. Rohatgi, Designs and Fabrication Technologies for Future Commercial Crystalline Si
Solar Cells”, Invention Disclosure Form, January 2006.
32.
A. Rohatgi and V. Meemongkolkiat, “Cost-Effective Formation of High Quality Back
Contact with Local Back Surface Field”, Invention Disclosure Form, February, 2006.
TECHNICAL REPORTS
Contract Required Major Final Reports
1.
R.H. Hopkins, J.R. Davis, A. Rohatgi, M.H. Hanes, P. Rai-Choudhury, and H.C.
Mollenkopf, "Effect of Impurities and Processing on Silicon Solar Cells," Contract
DOE/JPL-954331-81/14, 81-9F4-IMPUR-R3.
2.
R.B. Campbell, J.R. Davis, J.W. Ostroski, P. Rai-Choudhury, A. Rohatgi, E.J. Seman, and
R.E. Stapleton, "Phase 2 of the Array Automated Assembly Task for Low-Cost Solar Array
Project," Contract DOE/JPL 954873, 79-9F5-HELIO-R5.
3.
C.S. Duncan, R.G. Seidensticker, R.H. Hopkins, J.P. McHugh, P.D. Blais, J.R. Davis, R.B.
Campbell, and A. Rohatgi, "Silicon Web Process Development," Contract DOE/JPL NAS
954654-78/1.
4.
A. Rohatgi and P. Rai-Choudhury, "Research on the Basic Understanding of High Efficiency
in Silicon Solar Cells," DOE/SERI Contract XB-3-02090-4, 83-9F4-HIEFY-R2.
5.
A. Rohatgi, D.L. Meier and P. Rai-Choudhury, "Laser Assisted Solar Cell Metallization
Processing," DOE/JPL Contract 965515, 1985.
6.
A. Rohatgi, T.W. O'Keeffe, D.L. Meier, and P. Rai-Choudhury, "Research on the Basic
Understanding of High Efficiency in Silicon Solar Cells," DOE/JPL Contract
XB-3-02090-4, 1985.
7.
A. Rohatgi, A.W. Smith, G. Augustine, and S.A. Ringel, "Modelling and Analysis of High
Efficiency Solar Cells," DOE/SERI Contract XB-7-06070-1, 1987.
8.
A. Rohatgi, A.W. Smith, S.A. Ringel, and G. Augustine, "High Efficiency Crystalline Solar
Cell Research," DOE/SERI Contract XB-7-06070-1, 1987.
9.
A. Rohatgi and S.A. Ringel, "Research on A1GaAs/GaAs Interfaces in GaAs Solar Cells,"
DOE/Sandia Contract 02-2255, 1988.
10.
A. Rohatgi, C.J. Summers, A. Erbil, R. Sudharsanan, and S.A. Ringel, "High Efficiency
Cadmium and Zinc Telluride Based Thin Film Solar Cells," DOE/SERI Contract
72
XL-7-06031-1, 1988.
11.
A. Rohatgi, S.A. Ringel, and A.W. Smith, "Research on Design and Fabrication of High
Efficiency Solar Cells," DOE/Sandia Contract 57-6152, 1989.
12.
A. Rohatgi, C.J. Summers, A. Erbil, R. Sudharsanan, and S.A. Ringel, "High Efficiency
Cdamium and Zinc Telluride Based Thin Film SolarCells," DOE/SERI Contract
XL-7-06031-1, 1989.
13.
A. Rohatgi and W.A. Doolittle, "Impurity and Defect Characterization in Silicon,"
DOE/SERI Contract XX-8-18155-1, 1989.
14.
A. Rohatgi, S.A. Ringel, and A.W. Smith, "Research on Design and Fabrication of High
Efficiency Solar Cells," DOE/Sandia Contract 57-6152, SAND-89-7139, 1990.
15.
A. Rohatgi, C.J. Summers, A. Erbil, R. Sudharsanan, and S.A. Ringel, "High Efficiency
Cadmium and Zinc Telluride Based Thin Film Solar Cells," DOE/SERI Contract
XL-7-06031-1, 1990.
16.
A. Rohatgi, W.A. Doolittle, J. Salami, and P. Sana, "Impurity and Defect Characterization in
Silicon," DOE/SERI Contract XX-0-19145-1, 1990.
17.
A. Rohatgi, A.W. Smith, and J. Salami, "Modelling and Fabrication of High Efficiency
Silicon Solar Cells," DOE/Sandia Contract 42-3377, 1990.
18.
A. Rohatgi, R.R. King, J. Salami, P. Sana, and A.W. Smith, "Investigation and Fabrication
of High Efficiency Silicon SolarCells," DOE/Sandia Contract 78-2488, 1991.
19.
A. Rohatgi, C.J. Summers, A. Erbil, R. Sudharsanan, and S.A. Ringel, "High Efficiency
Cadmium and Zinc Telluride Based Thin Film Solar Cells," DOE/SERI Contract
XL-7-06031-1, 1992.
20.
A. Rohatgi, S.K. Pang, and W.A. Doolittle, "Basic Research on Advanced Silicon Materials
for High Performance Photovoltaic Devices, Vol 1: Single Crystal Silicon; Vol 2:
Polycrystalline Silicon," EPRI Contract TR-100486-8001-4, 1992.
21.
A. Rohatgi, S. Narasimha, J. Moscher, A. Ebong, S. Kamra, T. Krygowski, P. Doshi, A.
Yelundur, “Fundamental Understanding and Development of Low-Cost, High-Efficiency
Silicon Solar Cells,” Sandia Contract, SAND99-0235, Unlimited Release, 1999.
22.
A. Rohatgi, A. Ebong, V. Yelundur, M. Hilali, J. Jeong, A. Ristow, B. Damiani, J. Brody, T
Krygowski, S. Narasimha, “Fundamental Understanding and Development of Low-Cost,
High Efficiency Silicon Solar Cells,” Sandia Contract SAND2000-0232, Unlimited Release,
73
2000.
23
A. Rohatgi, A. Ebong, V. Yelundur, M. Hilali, J. Jeong, A. Ristow, B. Damiani, J. Brody, T.
Krygowski, S. Narasimha, P. Doshi, and J. Moschner. “Fundamental Understanding and
Development of Low-Cost, High Efficiency Silicon Solar Cells,” Sandia Contract SAND
2001-0230, Unlimited Release, February 2001.
Other Research Reports
1.
A. Rohatgi, J.R. Davis, P. Rai-Choudhury, P.D., Blais and R.H. Hopkins, "Study of Impurity
Effects on Solar Cell by I-V Analysis," 78-1F5-SOLEP-R1.
2.
A. Rohatgi, P. Rai-Choudhury, and S.G. Hitchins, "Process Induced Defects and Their
Influence on Carrier Lifetime in Silicon," 79-1F5-ILSIC-R1.
3.
D.L. Meier and A. Rohatgi, "Comparison of Solar Cells Fabricated on Dendritic Web
Silicon by Ion Implantation and by Diffusion," 80-1F4, R1.
4.
J. Bartko and A. Rohatgi, "The Defects Produced by 40 MeV Electron Irradiation on Power
Devices and Their Relation to Fast Switching Properties," 80-1CG-PIRAD-R1.
5.
A. Rohatgi, "Process Induced Radiation Damage in MOS Devices," 82-1F4-IRRAD-R2.
6.
A. Rohatgi and M.R. Chin, "Plasma Process Induced Radiation Damage in MOS Devices,"
83-1F41-RADAM-R1.
7.
A. Rohatgi, J.R. Davis, D.L., Meier, R.G. Seidensticker and P. Rai-Choudhury, "High
Effieiency Dendritic Web Silicon Solar Cells," 82-1F41-MODUL-R1.
8.
A. Rohatgi and S. Dutta, "A Study of Dendritic Web Silicon Properties for Integrated
Circuits," 82-1F41-WEBIC-R1.
9.
A. Rohatgi. "Plasma and X-Ray Irradiation Effects on MOS Devices," 81-1F4-IRRAD-M1.
10.
A. Rohatgi, D.L. Meier, R.G. Seidensticker, P. Rai-Choudhury, and J.R. Davis, "A
Comparison Study of Ion-Implanted and Diffused Solar Cells," 81-1F4-MODUL-M1.
11.
A. Rohatgi, "DLTS Study of Deep Traps Induced in P-Type Silicon During Thermal Donor
Formation," 82-1F4-TADEF-M1.
OTHER PROFESSIONAL ACTIVITIES/SERVICE
Reviewing and Editorial Work
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1.
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3.
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21.
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25.
26.
27.
28.
Program Chairman of the Pittsburgh IEEE Local Chapter on Electron Devices, 1981
Vice Chairman of the Pittsburgh IEEE Local Chapter on Electron Devices, 1983
Chairman, Technical Proposal Evaluation Committee, DOE/SERI, 1988
Editorial Board Member and Reviewer, Journal of Progress on Photovoltaics
Editorial Board Member and Reviewer, Solar Energy Materials and Solar Cells
Reviewer, Technical Proposals for DOE/SERI and NSF
Reviewer, Journal of Electrochemical Society
Reviewer, IEEE Transactions on Electron Devices
Reviewer, Journal of Material Science
Reviewer, Solar Cells
Reviewer, ASTM Publications
Reviewer, Journal of Applied Physics
Reviewer, Journal of Electronic Materials
Reviewer, John Wiley Publishing Company
Reviewer, West Educational Publishing Company
Editor, Special Issue of Solar Cells on High Efficiency Silicon Solar Cells
Sub-area Chair, 23rd Photovoltaic Specialists Conference Program Committee, 1993
Executive Secretary, First World Conference on Photovoltaic Energy Conversion,
1993-1994.
Silicon Area Chair, 25th IEEE Photovoltaic Specialists Conference Program
Committee,1995
Technical Program Chairman, 26th IEEE Photovoltaic Specialists Conference Program
Committee, Anaheim, CA, July 1997.
Session Chair, 25th IEEE Photovoltaic Specialists Conference Program Committee, 1996
Chair Elect, 2nd World Conference and Exhibition on Photovoltaic Solar Energy
Conversion, Vienna, Austria, July 1998.
General Chair, 28th IEEE Photovoltaic Specialist Conference, Anchorage, Alaska, 2000.
Georgia Institute of Technology Strategic Planning Committee, 1999.
Georgia Institute of Technology Dean’s College of Engineering Faculty Honors Committee,
1999.
Georgia Institute of Technology Electrical and Computer Engineering Faculty Honors
Committee, 1999.
International Advisor Committee, Third World conference on Photovoltaic Energy
Conversion, Osaka, Japan, 2003.
Co-organizer of International Symposium on Photovoltaics for 21st Century at the
Electrochemical Society Meeting, Seattle, Washington, 1999.
Short Courses Given at Conferences
1.
A. Rohatgi, "High Efficiency Solar Cells", at the SPIE Meeting (Society for Optical
Engineers),Boston, MA, September 1986.
75
2.
3.
A. Rohatgi, "Characterization Techniques for Solar Cells", 21st Photovoltaics Specialists
Conference, Orlando, FL, May 1990.
A. Rohatgi, “Solar Cells Short Course,” Indian Institute of Technology, December 30, 2005,
Kanpur, India.
On-Campus Committees
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31.
Member, Microelectronics Research Committee, 1986-1987.
Member, Spotlight on Advanced Materials Committee, 1987.
Member, Faculty Honors and Welfare Committee, 1988-1992.
Member, Joseph Pettit Chair Search Committee, 1988-present.
Member, Electrical Engineering Director's Search Committee, 1989.
Member, Georgia Tech Research Advisory Council, 1989-1991.
Member, Utilization for Institutional Equipment Committee, 1989-1991.
Member, Ad-hoc Committee For Management and Utilization of
Equipment, 1990.
Member, Electrical Engineering Undergraduate Curriculum Committee,
1991.
Member, Electrical Engineering Planning Committee, 1990.
Member, College of Engineering Strategic Planning Committee, 1992.
Member, Materials Science and Engineering Director's Search
Committee, 1992-1993.
Member, Research and Demonstration Initiative For Olympic Village
Committee, 1992-present.
Member, Georgia Tech Olympic Design Review Committee, 1993.
Member, Executive Vice President's Advisory Committee on Tenure,
Promotion and Reappointment, 1990 and 1991.
Member, Georgia Tech Sigma Xi Doctoral Dissertation Award Committee, 1993.
Chair, Institute Strategic Planning Committee for Thrust Area Energy, 1992-93.
Member, Institute Strategic Planning Committee for Materials, 1994.
Member, Institute Materials Council, 1994-present.
Member, Georgia Tech Institute Research Committee
Member, Electrical and Computer Engineering Post Tenure Review Committee, 1997
Member, Electrical and Computer Engineering Faculty Honors Committee, 1998
Member, Electrical and Computer Engineering Faculty Honors Committee, 1999
Member, College of Engineering Regents Professor Committee, 2000
Co-Chair, NSF Sustainable Tech Workshop at Georgia Tech November, 2000.
Chair, Institute Faculty Honors Awards Committee 1998
Member, Institute Post Tenure Review Policy Committee 1997.
Chair, Institute Regents Professor Award Committee, 2001
Member, Institute Faculty Honors Awards Committee 2002
Member, Institute Faculty Honors Awards Committee 2003
Member, Sigma Xi Awards Committee 2005
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32.
Member, Institute Faculty Honors Awards Committee 2005
Engineering Consulting
1.
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Westinghouse R&D Center, Pittsburgh, PA, High Efficiency Silicon Solar Cells, 1985-1986.
Alcoa Technical Center, Pittsburgh, PA, Electronic Materials and Substrates, 1985-present.
Electric Power Research Institute (EPRI), Palo Alto, CA, Concentrator Solar Cell
Development,1986-1988.
Monsanto, Spartanburg, SC, Silicon Material for Integrated Circuits, 1986-1987.
Solarex, Rockville, MD, Cast Silicon Material and Solar Cells, 1988.
East Kodak Company, Rochester, NY, Impurities in Silicon 1988.
Mobil Solar Company, Waltham, MA, Silicon Ribbon Solar Cells, 1987-present.
Alladin International Company, Solar Product Development, Nashville, TN, 1987-1989.
Spectralab Inc., Sylmar, CA, Process-Induced Defects in Silicon, 1990.
Eaton Corporation, Deer Park, NY, Silicon Oxidation, 1989-90.
Electric Power Research Institute,Palo Alto, CA Inversion Layer Solar Cell Development,
1991-present.
MEMC Electronic Materials Company, Defects in Silicon Materials, St. Peters, MO, 1992.
National Renewable Energy Laboratories, Evaluation of Research Proposals, Denver, CO,
1992.
Ebara Solar, Dendritic Web Silicon Material and Solar Cells, Large, PA, 1994 - 2000.
Interface Inc., Emerging PV Technologies, Marietta, GA., 1997.
Evergreen Solar, String Ribbon Solar Cells, Waltham, MA., 1997.
ASE America, EFG Sheet Silicon Solar Cells, Waltham, MA., 1997
Invited Conference Session Chairmanships
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Electrochemical Society Meeting, Montreal, Canada, 1981.
Electrochemical Society Meeting, San Francisco, CA, 1983.
20th IEEE Photovoltaic Specialists Conference, Las Vegas, NV, 1985.
Electrochemical Society Meeting, Chicago, IL, 1988.
Photovoltaic Science and Engineering Conference, Sydney, Australia, 1989.
Photovoltaic Science and Engineering Conference, Kyoto, Japan, 1990.
Third Sunshine Workshop on Crystalline Silicon Cells, Mashima, Japan, 1990.
11th European Photovoltaic Solar Energy Conference, Montreux, Switzerland, 1992.
IEEE Photovoltaic Science and Engineering Conference, New Delhi, India, 1992.
23rd IEEE Photovoltaic Specialists Conference, Louisville, KY, 1993.
Third Workshop on the Role of Point Defects/Defect Complexes in Silicon Device
Processing, Vail, CO, 1993.
12th NREL PV Program Review Meeting, Denver, CO, 1993.
Sixth Sunshine Workshop on Crystalline Silicon Solar Cells, Tokyo, Japan, 1993.
Sixth International Photovoltaic Science and Engineering Conference, Nagoya, Japan, 1993.
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First European International Workshop on Crystalline Silicon Solar Cells, Madrid, Spain,
1994.
Fourth Workshop on the Role of Point Defects/Defect Complexes in Silicon Device
Processing, Beaver Creek, CO, 1994.
25th IEEE Photovoltaic Specialists Conference, Washington, DC, 1996
Fifth Workshop on the Role of Impurities and Defects in Silicon Device Processing, Copper
Mountain, CO, 1995.
Ninth Sunshine Workshop on Crystalline Silicon Solar Cells, Tokyo, Japan, 1996.
Ninth International Photovoltaic Science and Engineering Conference, Miyazaki, Japan,
1996.
26th IEEE Photovoltaic Specialists Conference, Anaheim, California, 1997.
Chaired Panel Discussion, 2nd World Conference and Exhibition on Photovoltaic Solar
Energy Conversion, Vienna, Austria 1998.
NCPV Roadmap Presentation, Denver, CO 1999.
NCPV Roadmap Presentation, Denver, CO 2000.
Chaired Session, India IUMRS, New Delhi, India 2000.
Chaired Opening Session of the 28th IEEE PVSC Conference, Anchorage, Alaska 2000.
Chaired Session, 29th IEEE PVSC Conference, New Orleans, Lousiana 2002.
Vice-Chair, 3rd World Conference and Exhibition on Photovoltaic Solar Energy Conversion,
Osaka, Japan
Co-Chaired Oral Session of the WCPEC-3 Conference, Osaka, Japan 2003.
Book Editing
1.
Solar Cells, their Science, Technology, Applications and Economics Guest Editor
Ajeet Rohatgi, Volume 17, Number 1, March 1986.
2.
Photovoltaics For the 21st Century, Editors V.K. Kapur, R.D. McConnell, D. Carlson, G.P.
Ceasar, A. Rohatgi, Proceedings of the International Symposium, Electrochemical Society
Meeting, Seattle, Washington, Volume 99-11, 1999.
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