Electrical effects of metal nanoparticles embedded in ultra-thin colloidal quantum dot films

F. J. Beck; F. P. Garcia De Arquer; M. Bernechea; G. Konstantatos

doi:10.1063/1.4738993

Electrical effects of metal nanoparticles embedded in ultra-thin colloidal quantum dot films

F. J. Beck^*, F. P. Garcia De Arquer, M. Bernechea, G. Konstantatos

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

18 Citations (Scopus)

Abstract

Plasmonic light trapping can increase the absorption of light in thin semiconductor films. We investigate the effect of embedded metal nanoparticle (MNP) arrays on the electrical characteristics of ultra-thin PbS colloidal quantum dot (CQD) photoconductors. We demonstrate that direct contact with the metal nanoparticles can suppress or enhance the photocurrent depending on the work function of the metal, which dominates the optical effects of the particles for ultra-thin films. These results have implications for designing plasmonic CQD optoelectronic devices.

Original language	English
Article number	041103
Journal	Applied Physics Letters
Volume	101
Issue number	4
DOIs	https://doi.org/10.1063/1.4738993
Publication status	Published - 23 Jul 2012
Externally published	Yes

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abstract = "Plasmonic light trapping can increase the absorption of light in thin semiconductor films. We investigate the effect of embedded metal nanoparticle (MNP) arrays on the electrical characteristics of ultra-thin PbS colloidal quantum dot (CQD) photoconductors. We demonstrate that direct contact with the metal nanoparticles can suppress or enhance the photocurrent depending on the work function of the metal, which dominates the optical effects of the particles for ultra-thin films. These results have implications for designing plasmonic CQD optoelectronic devices.",

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AB - Plasmonic light trapping can increase the absorption of light in thin semiconductor films. We investigate the effect of embedded metal nanoparticle (MNP) arrays on the electrical characteristics of ultra-thin PbS colloidal quantum dot (CQD) photoconductors. We demonstrate that direct contact with the metal nanoparticles can suppress or enhance the photocurrent depending on the work function of the metal, which dominates the optical effects of the particles for ultra-thin films. These results have implications for designing plasmonic CQD optoelectronic devices.

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Electrical effects of metal nanoparticles embedded in ultra-thin colloidal quantum dot films

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