Issue 12, 2013

Broad spectral photocurrent enhancement in Au-decorated CdSe nanowires

Abstract

Metal–semiconductor hybrid nanostructures promise improved photoconductive performance due to plasmonic properties of the metal portions and intrinsic electric fields at the metal–semiconductor interface that possibly enhance charge separation. Here we report gold decorated CdSe nanowires as a novel functional material and investigate the influence of gold decoration on the lateral facets on the photoconductive properties. Gold decorated nanowires show typically an at least ten-fold higher photocurrent as compared to their bare counterparts. Interestingly, the photocurrent enhancement is wavelength independent, although the plasmon resonance related to the gold particles appears in the absorption spectra. Our experiments show that light scattering and Schottky fields associated with the metal–semiconductor interface are at the origin of the photocurrent enhancement.

Graphical abstract: Broad spectral photocurrent enhancement in Au-decorated CdSe nanowires

Supplementary files

Article information

Article type
Paper
Submitted
11 Feb 2013
Accepted
17 Mar 2013
First published
20 Mar 2013

Nanoscale, 2013,5, 5334-5340

Broad spectral photocurrent enhancement in Au-decorated CdSe nanowires

R. Chakraborty, F. Greullet, C. George, D. Baranov, E. Di Fabrizio and R. Krahne, Nanoscale, 2013, 5, 5334 DOI: 10.1039/C3NR00752A

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