INVITED
Infrared Colloidal Quantum Dot Optoelectronic Devices
E. H. Sargent1
1
Electrical and Computer Engineering, University of Toronto
Toronto, ON, M5S 3G4, Canada
The fabrication of optoelectronic devices via spin-coating onto an arbitrary substrate offers ease of
integration, low cost, and physical flexibility. Reports of active optoelectronic devices operating in
the infrared, and made via solution-processing, emerged in the early 2000’s [1]. Here we review
progress in infrared solar cells, image sensors, and optical sources based on solution-processed
materials. The best solution-processed photodetectors now provide sensitivities in the 10E13 Jones
D* range [2, 3], exceeding the sensitivity of the best epitaxially-grown short-wavelength infrared
photodetectors. The latest published reports of solution-processed infrared photovoltaics reach
4.2% power conversion efficiencies [4], placing them a factor of three away from enabling a
doubling in overall solar power conversion efficiency of today’s best visible-wavelength solutionprocessed photovoltaics. Infrared optical sources, both broadband light-emitting diodes and, more
recently, lasers [5] and modulators [6], have now also been reported at 1.5 um. We review the
progress and future prospects of this rapidly-advancing field.
[1]
[2]
[3]
[4]
[5]
[6]
S. A. McDonald, G. Konstantatos, S. Zhang, P. W. Cyr, E. J. D. Klem, L. Levina and E. H.
Sargent, "Solution-processed PbS quantum dot infrared photodetectors and photovoltaics,"
Nature Materials, vol. 4, pp. 138-142, 2005.
G. Konstantatos, I. Howard, A. Fischer, S. Hoogland, J. Clifford, E. Klem, L. Levina and E.
H. Sargent, "Ultrasensitive solution-cast quantum dot photodetectors," Nature, vol. 442, pp.
180-183, 2006.
G. Konstantatos, J. Clifford, L. Levina and E. H. Sargent, "Sensitive solution-processed
visible-wavelength photodetectors," Nature Photonics, vol. 1, pp. 531-534, 2007
K. W. Johnston, A. G. Pattantyus-Abraham, J. P. Clifford, S. H. Myrskog, D. D. MacNeil, L.
Levina and E. H. Sargent, "Schottky-Quantum Dot Photovoltaics for Efficient Infrared Power
Conversion," Applied Physics Letters, vol. 92, 2008.
S. Hoogland, V. Sukhovatkin, I. Howard, S. Cauchi, L. Levina, E. H. Sargent, “A Solutionprocessed 1.53 um Quantum Dot Laser with Temperature-invariant Emission Wavelength,”
Optics Express, vol. 14, no. 8, pp. 3273-3281, 2006.
S. Hoogland, V. Sukhovatkin, H. Shukla, J. P. Clifford, L. Levina and E. H. Sargent,
"Megahertz-frequency solution-processed infrared optical modulators based on colloidal
quantum dots," Optics Express, vol. 16, no. 9, pp. 6683-6691.
--------------------------------------------PRIMARY TOPIC: M
SECONDARY TOPIC: J2
THIRD TOPIC: O
PREFERRED FORMAT OF PRESENTATION (ORAL/POSTER): Invited
--------------------------------------------Corresponding author name: Edward H Sargent
Corresponding author email: ted.sargent@utoronto.ca
Please name this file: LastName_Topic1_Topic2
TOPICS
Please choose primary and secondary topics
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B
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H
I
J
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M
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P
Q
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Optical properties of materials
A1
General
A2
Crystals
A3
Polycrystalline bulk and film
A4
Amorphous and organics
A5
Nanostructures, including photonic crystals
Preparation and Characterization of Quantum Dots, Quantum Wires and
Other Quantum Structures
Excitonic Processes
Luminescence, Phosphors, Scintillators and Applications
Photoinduced Effects and Applications
Photoconductivity and Photogeneration
Nonlinear Optical Effects and Applications
Electro-Optic Effects and Applications
Glasses for Optics, Optoelectronics and Photonics (including ZBLAN,
fluozirconate, oxyfluoride and other glasses)
Polymers for Optics, Optoelectronics and Photonics
Semiconductors for Optoelectronics
J1
Semiconductors for Optoelectronics: Wide Bandgap
J2
Semiconductors for Optoelectronics: Narrow Bandgap
J3
Semiconductors for Optoelectronics: Heterostructures
Light Emitting Devices (including organics)
Photonic and Optoelectronic Materials and Devices (including devices for
telecommunications, laser and detectors)
Optical Storage
Photovoltaics (materials and devices, and their properties)
Waveguides and Integrated Photonics
Silicon Photonics
Optical Fibers and Fiber Sensors
Experimental Techniques
Femtosecond Spectroscopy
Teraherz (THz) techniques, including materials, emitters and detectors
Defect Spectroscopy
Plasmons and Surface Plasmons
Selected Topics (e.g. Photocatalysts in Materials, Materials for Energy
Conversion etc)
Invited Abstract submission
Before: 1 February, 2008