Broad spectral photocurrent enhancement in Au-decorated CdSe nanowires

Ritun Chakraborty, Fanny Greullet, Chandramohan George, Dmitry Baranov, Enzo M. Di Fabrizio, Roman Krahne

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

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. © 2013 The Royal Society of Chemistry.
Original languageEnglish (US)
Pages (from-to)5334
JournalNanoscale
Volume5
Issue number12
DOIs
StatePublished - 2013

ASJC Scopus subject areas

  • Materials Science(all)

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