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Plasmonic light trapping leads to responsivity increase in colloidal quantum dot photodetectors

Pelayo García de Arquer, F; Beck, Fiona; Bernechea, María; Konstantatos, Gerasimos


We report broadband responsivity enhancement in PbS colloidal quantum dot (CQDs) photoconductive photodetectors due to absorption increase offered by a plasmonic scattering layer of Ag metal nanoparticles. Responsivity enhancements are observed in the near infrared with a maximum 2.4-fold increase near the absorption band edge of 1 lm for 400 nm thick devices. Additionally, we study the effect of the mode structure on the efficiency of light trapping provided by random nanoparticle...[Show more]

CollectionsANU Research Publications
Date published: 2012
Type: Journal article
Source: Applied Physics Letters
DOI: 10.1063/1.3678039


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