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Proceedings Paper

Solution-based photodetectors for monolithically integrated low-cost short-wave infrared focal plane arrays
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Paper Abstract

In this work, PbS Colloidal Quantum Dots (CQD) based photodiodes are realized on both silicon substrates and on the replicas of the ROICs in order to demonstrate fully integrated FPAs. Careful optimization of PbS CQD film formation and ligand exchange process, together with optimization of IC integrable process steps resulted in high performance, monolithically integrable photodiodes. High quantum efficiencies such as 32% is achieved for photodiodes on Si substrates and high responsivities up to 5,73 A/W is achieved for photodiodes on ROIC replicas. Also these detectors achieved very high normalized detectivities such as; 1.36 x 1011 Jones and 1.42 x 1012 Jones under 1V and 2V reverse bias respectively, which is close to conventional InGaAS SWIR detectors.

Paper Details

Date Published: 29 May 2013
PDF: 9 pages
Proc. SPIE 8725, Micro- and Nanotechnology Sensors, Systems, and Applications V, 87252N (29 May 2013); doi: 10.1117/12.2018496
Show Author Affiliations
Emre Heves, Sabanci Univ. (Turkey)
Huseyin Kayahan, Sabanci Univ. (Turkey)
Yasar Gurbuz, Sabanci Univ. (Turkey)

Published in SPIE Proceedings Vol. 8725:
Micro- and Nanotechnology Sensors, Systems, and Applications V
Thomas George; M. Saif Islam; Achyut K. Dutta, Editor(s)

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