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

Pelayo Garciia de Arquer, F., Beck, Fiona J., Bernechea, Maria and Konstantatos, Gerasimos 2012. Plasmonic light trapping leads to responsivity increase in colloidal quantum dot photodetectors. Applied Physics Letters 100 (4) , 043101. 10.1063/1.3678039

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Abstract

We report broadband responsivity enhancement in PbScolloidalquantum dot (CQDs) photoconductive photodetectors due to absorption increase offered by a plasmonicscattering 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 μm for ∼400 nm thick devices. Additionally, we study the effect of the mode structure on the efficiency of light trapping provided by random nanoparticlescattering in CQD films and provide insights for plasmonicscattering enhancement in CQD thin films.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Additional Information: Published PDF uploaded in accordance with policy at http://www.sherpa.ac.uk/romeo/issn/0003-6951/ [accessed 26/08/2016]
Publisher: American Institute of Physics
ISSN: 0003-6951
Date of First Compliant Deposit: 11 August 2016
Last Modified: 17 Oct 2019 18:36
URI: https://orca.cardiff.ac.uk/id/eprint/93767

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