Faculty’s Major Researches
Department of Electronic Engineering
Optoelectronics and Semiconductor Group
Professor Bohr-Ran Huang
Ph.D., Michigan State University, U.S.A.
Field of study: nanomaterials and devices, optoelectronic thin
films devices, biophotonics and solar cells
applications
Key words: nanowire, gas sensor, field emission,
Nano Optoelectronic devices
URL: http://homepage.ntust.edu.tw/huangbr
Email: huangbr@mail.ntust.edu.tw
Phone: 886-2-27303273
1. The Subject and Aims of Research
The application of nanostructure materials and optoelectronic thin films devices were
mainly studied. It included the field emission display (FED) technology and ion gas sensor. At
present, the major objects were the fabrication of large area nanowires applied to
photo-detector, the fabrication of triode structure field emission devices of nano-diamond thin
film, the analysis of electronic characteristics of thin films heterojuction and micro-ionization
gas sensor. The applications to biophotonics and energy-efficiency photoelectron of
nanostructure materials were also developed. And combine the nanoimprinting lithography
technology to develop the advanced nano-optoelectronic devices.
2. (1) Fabrication and application of large area and low-cost nanowires: One-dimensional
nanostructures are significant for nanoscale devices based on their distinctive structures and
properties. At recent years, we successfully synthesized nanowires by SLS (solid-liquid-solid)
growth mechanism in thermal CVD system. The best growth conditions and the optimal
properties of the nanowires were further studied for the fabrications of optoelectronic and
biophotonic applications.
(a)
The optoelectronic application of nanowires:
The electrons only could move along the unlimited direction to cause the surface
effects, scale effects and quantum effects. The characteristics performed at
nanostructure materials were so different from bulk that make the material broadly
applied to optoelectronic device.
Fig 1. Nanowire network layers for application of photodetector.
(b)
The gas-sensing application of nanowires:
Due to the high surface ratio, the surface energy percentage of total energy would
strongly raise to the better physical and chemical properties than bulk materials.
The characteristics of nanowires were useful to be the suitable materials applied to
gas-sensing.
(2) Micro-Ionization Gas Sensors：Nano-crystalline diamond film field emission devices
applied to gas ionization sensing have been investigated successfully in our team. The
influence on breakdown voltage of an-element gas and mixed gas at different pressure could
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Faculty’s Major Researches
Department of Electronic Engineering
be observed to detect deadly gas in industrial factory.
(3) Application of field emission properties by triode structure of nano-crystalline
diamond films：Due to nano-crystalline diamond film have outstanding physical and
chemical properties such as negative electron affinity. Therefore, nano-crystalline diamond
film can be investigated for application as field emission electron sources. It was suggested
that the triode structure of NCD films could improve the field emission characteristics.
Fig 2. The triode structure of nanocrystalline
diamond film.
Fig 3. The SEM image of the gate structure for
nanocrystalline diamond film.
(4) Fabrication of nano thin film optoelectronic device by nanoimprinting lithography
technology: The complex steps of traditional lithography technology cause the cost of
process increased. Therefore, nanoimprinting lithography technology not only could replace
traditional complex steps but also to minish the size of semiconductor device. At present, we
use nanoimprinting lithography technology to develop the advanced nano-optoelectronic
devices.
3. Selected Publications and Projects
Publications:
1. Bohr-Ran Huang*, Jung-Fu Hsu, Chien-Sheng Huang, Yu-Tai Shih, and Kao-Sheng Lu,
“Silicon nanowire networks for the application of field effect phototransistor”, Material
Science and Engineering C,27, pp. 1197-1200, 2007. SCI, (Impact factor:1.325)
2. Ming-Shien Hu, Hsin-Li Chen, Ching-Hsing Shen, Lu-Sheng Hong, Bohr-Ran Huang,
Kuei-Hsien Chen and Li-Chyong Chen, “Photosensitive gold nanoparticle-embedded
dielectric nanowires”, Nature Materials, Vol. 5, pp. 102-106, 2006. SCI, (Impact
factor:19.194)
3. Bohr-Ran Huang, Jung-Fu Hsu, Chien-Sheng Huang ,” The effects on the field
emission properties of silicon nanowires by different pre-treatment techniques of
Ni catalysts layers”, Diamond & Related Materials, Vol. 14, pp. 2105-8, 2005.
SCI, (Impact factor:1.935)
4.
B. R. Huang, C. S. Huang, C. F. Hsieh, Y. F. Liu, 2004, “The Electrical Conduction
Mechanism of multiwalled carbon nanotubes film synthesized by microwave plasma
chemical vapor deposition", Diamond & Related Materials. Vol. 13, pp. 2131-35. SCI,
(Impact factor:1.935)
5.
C. L. Li, B. R. Huang, S. Chattopadhyay*, L. C. Chen and K. H. Chen, 2004,
“Amorphous boron carbon nitride as a pH sensor”, Applied Physics Letters,
84(15), pp.2676-78. SCI. (Impact factor: 3.977)
Patents:
(1) A METHOD FOR MASS PRODUCTION OF SILICON NANOWIRES
(2) STRATIFIED SUBSTRATE STRUCTURE AND METHOD FOR PRODUCING
NANOWIRES USING THE SAME
Projects:
(1) Bohr-Ran Huang, 2006-8, The Fabrication of nano-diamond Field Emission Display
Array and its Application in Gas Sensors, National Science Council of the Republic of
China.
(2) Bohr-Ran Huang, 2007-2010, Large Area Fabrication and Optoelectronic Device
Applications for Silicon Nanowires, National Science Council of the Republic of China.
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