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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/9170

Title: Photoconductivity in sputter-deposited CdS and CdS-ZnO nanocomposite thin films
Authors: VASA, P
TANEJA, P
AYYUB, P
SINGH, BP
BANERJEE, R
Keywords: nanocrystals
Issue Date: 2002
Publisher: IOP PUBLISHING LTD
Citation: JOURNAL OF PHYSICS-CONDENSED MATTER, 14(2), 281-286
Abstract: Nanocrystalline CdS and CdS-ZnO thin films were deposited at room temperature using high-pressure radio-frequency magnetron sputtering. The CdS-ZnO nanocomposite film was made up of particles smaller than 2 nm and showed a composite band gap of 2.72 eV. Both samples showed appreciable photoconductivity, extremely fast response and high photostability. We show that the photoresponse in these samples arises mainly from the band-gap transition and excitonic contributions are insignificant. A comparison of the photocurrent response with absorption and photoluminescence data indicates that photocurrent spectroscopy is a simple and extremely useful technique for characterizing systems (such as nanoparticles) with low radiative cross sections.
URI: http://dx.doi.org/10.1088/0953-8984/14/2/314
http://dspace.library.iitb.ac.in/xmlui/handle/10054/9170
http://hdl.handle.net/10054/9170
ISSN: 0953-8984
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