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

Emre Heves; Huseyin Kayahan; Yasar Gurbuz

doi:10.1117/12.2018496

29 May 2013 Solution-based photodetectors for monolithically integrated low-cost short-wave infrared focal plane arrays

Emre Heves, Huseyin Kayahan, Yasar Gurbuz

Proceedings Volume 8725, Micro- and Nanotechnology Sensors, Systems, and Applications V; 87252N (2013) https://doi.org/10.1117/12.2018496
Event: SPIE Defense, Security, and Sensing, 2013, Baltimore, Maryland, United States

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.

Citation Download Citation

Emre Heves, Huseyin Kayahan, and Yasar Gurbuz "Solution-based photodetectors for monolithically integrated low-cost short-wave infrared focal plane arrays", Proc. SPIE 8725, Micro- and Nanotechnology Sensors, Systems, and Applications V, 87252N (29 May 2013); https://doi.org/10.1117/12.2018496

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