4 June 2015 PbS colloidal quantum dot photodiodes for low-cost SWIR sensing
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Abstract
RTI has developed a photodiode technology based on solution-processed PbS colloidal quantum dots (CQD). These devices are capable of providing low-cost, high performance detection across the Vis-SWIR spectral range. At the core of this technology is a heterojunction diode structure fabricated using techniques well suited to wafer-scale fabrication, such as spin coating and thermal evaporation. This enables RTI’s CQD diodes to be processed at room temperature directly on top of read-out integrated circuits (ROIC), without the need for the hybridization step required by traditional SWIR detectors. Additionally, the CQD diodes can be fabricated on ROICs designed for other detector material systems, effectively allowing rapid prototype demonstrations of CQD focal plane arrays at low cost and on a wide range of pixel pitches and array sizes.
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Ethan J. D. Klem, Ethan J. D. Klem, Chris Gregory, Chris Gregory, Dorota Temple, Dorota Temple, Jay Lewis, Jay Lewis, "PbS colloidal quantum dot photodiodes for low-cost SWIR sensing", Proc. SPIE 9451, Infrared Technology and Applications XLI, 945104 (4 June 2015); doi: 10.1117/12.2178532; https://doi.org/10.1117/12.2178532
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