High-performance SWIR sensing from colloidal quantum dot photodiode arrays

Ethan Klem; Jay Lewis; Chris Gregory; Garry Cunningham; Dorota Temple; Arvind D'Souza; Ernest Robinson; P. S. Wijewarnasuriya; Nibir Dhar

doi:10.1117/12.2026972

19 September 2013 High-performance SWIR sensing from colloidal quantum dot photodiode arrays

Ethan Klem, Jay Lewis, Chris Gregory, Garry Cunningham, Dorota Temple, Arvind D'Souza, Ernest Robinson, P. S. Wijewarnasuriya, Nibir Dhar

Author Affiliations +

Proceedings Volume 8868, Infrared Sensors, Devices, and Applications III; 886806 (2013) https://doi.org/10.1117/12.2026972
Event: SPIE Optical Engineering + Applications, 2013, San Diego, California, United States

Abstract

RTI has demonstrated a novel photodiode technology based on IR-absorbing solution-processed PbS colloidal quantum dots (CQD) that can overcome the high cost, limited spectral response, and challenges in the reduction in pixel size associated with InGaAs focal plane arrays. The most significant advantage of the CQD technology is ease of fabrication. The devices can be fabricated directly onto the ROIC substrate at low temperatures compatible with CMOS, and arrays can be fabricated at wafer scale. Further, device performance is not expected to degrade significantly with reduced pixel size. We present results for upward-looking detectors fabricated on Si substrates with sensitivity from the UV to ~1.7 μm, compare these results to InGaAs detectors, and present measurements of the CQD detectors temperature dependent dark current.

Citation Download Citation

Ethan Klem, Jay Lewis, Chris Gregory, Garry Cunningham, Dorota Temple, Arvind D'Souza, Ernest Robinson, P. S. Wijewarnasuriya, and Nibir Dhar "High-performance SWIR sensing from colloidal quantum dot photodiode arrays", Proc. SPIE 8868, Infrared Sensors, Devices, and Applications III, 886806 (19 September 2013); https://doi.org/10.1117/12.2026972

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