Solution-based PbS photodiodes, integrable on ROIC, for SWIR detector applications
Heves, Emre and Öztürk, Cem and Özgüz, Volkan Hüsnü and Gürbüz, Yaşar (2013) Solution-based PbS photodiodes, integrable on ROIC, for SWIR detector applications. IEEE Electron Device Letters, 34 (5). pp. 662-664. ISSN 0741-3106
Official URL: http://dx.doi.org/10.1109/LED.2013.2253756
Photodiodes, based on PbS colloidal quantum dots (CQD), are realized on both silicon substrates and the replicas of the read-out integrated circuits (ROICs) to demonstrate the first, fully integrated focal plane arrays. Careful optimization of PbS CQD film formation and ligand exchange process, together with optimized process steps, resulted in high performance, monolithically integrable photodiodes. High quantum efficiencies of 32% are achieved for photodiodes on Si substrates and high responsivities up to 5.73 A/W is achieved for photodiodes on ROIC replicas. These detectors achieved very high, normalized detectivities of 1.36 x 10(11) Jones and 1.42 x 10(12)Jones under 1 and 2-V reverse bias, respectively, that are close to conventional InGaAs short wave infrared detectors.
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