Open Access
Proceedings of SPIE - The International Society for Optical Engineering
Solution-processed colloidal quantum dot photodiodes for low-cost SWIR imaging
1
RTI International, United States
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Publication type: Proceedings Article
Publication date: 2012-05-01
Quartile SCImago
— Quartile WOS
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Impact factor: —
ISSN: 0277786X, 1996756X
Abstract
While InGaAs-based focal plane arrays (FPAs) provide excellent detectivity and low noise for SWIR imaging applications, wider scale adoption of systems capable of working in this spectral range is limited by high costs, limited spectral response, and costly integration with Si ROIC devices. RTI has demonstrated a novel photodiode technology based on IR-absorbing solution-processed PbS colloidal quantum dots (CQD) that can overcome these limitations of InGaAs FPAs. We have fabricated devices with quantum efficiencies exceeding 50%, and detectivities that are competitive with that of InGaAs. Dark currents of ~2 nA/cm2 were measured at temperatures compatible with solid state coolers. Additionally, by processing these devices entirely at room temperature we find them to be compatible with monolithic integration onto readout ICs, thereby removing any limitation on device size. We will show early efforts towards demonstrating a direct integration of this sensor technology onto a Si ROIC IC and describe a path towards fabricating sensors sensitive from the visible to 2200 nm at a cost comparable to that of CMOS based devices. This combination of high performance, dramatic cost reduction, and multispectral sensitivity is ideally suited to expand the use of SWIR imaging in current applications, as well as to address applications which require a multispectral sensitivity not met by existing technologies.© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Top-30
Citations by journals
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Russian Chemical Reviews
1 publication, 100%
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Citations by publishers
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Autonomous Non-profit Organization Editorial Board of the journal Uspekhi Khimii
1 publication, 100%
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Klem E. J. D. et al. Solution-processed colloidal quantum dot photodiodes for low-cost SWIR imaging // Proceedings of SPIE - The International Society for Optical Engineering. 2012.
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Klem E. J. D., Lewis J., Gregory C., Cunningham G., Temple D. Solution-processed colloidal quantum dot photodiodes for low-cost SWIR imaging // Proceedings of SPIE - The International Society for Optical Engineering. 2012.
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TY - CPAPER
DO - 10.1117/12.919308
UR - https://doi.org/10.1117/12.919308
TI - Solution-processed colloidal quantum dot photodiodes for low-cost SWIR imaging
T2 - Proceedings of SPIE - The International Society for Optical Engineering
AU - Klem, Ethan J. D.
AU - Lewis, Jay
AU - Gregory, Christopher
AU - Cunningham, Garry
AU - Temple, Dorota
PY - 2012
DA - 2012/05/01 00:00:00
PB - SPIE
SN - 0277-786X
SN - 1996-756X
ER -
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@inproceedings{2012_Klem,
author = {Ethan J. D. Klem and Jay Lewis and Christopher Gregory and Garry Cunningham and Dorota Temple},
title = {Solution-processed colloidal quantum dot photodiodes for low-cost SWIR imaging},
year = {2012},
month = {may},
publisher = {SPIE}
}