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(CdSe) ZnS core shell quantum dots decorated zinc oxide nanowires for solar energy harvesting applications

Published online by Cambridge University Press:  01 March 2011

Abhishek Prasad ,
Archana Pandey ,
Karl Walczak ,
Craig Friedrich  and
Yoke Khin Yap
Abhishek Prasad
Affiliation:
Department of Physics
Archana Pandey
Affiliation:
Department of Physics
Karl Walczak
Affiliation:
Department of Mechanical Engineering-Engineering Mechanics Michigan Technological University Houghton, Michigan 49931, U.S.A.
Craig Friedrich
Affiliation:
Department of Mechanical Engineering-Engineering Mechanics Michigan Technological University Houghton, Michigan 49931, U.S.A.
Yoke Khin Yap
Affiliation:
Department of Physics
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Abstract

ZnO nanostructures have proven to be versatile functional materials with promising electronic, piezoelectric and optical properties. Here, we report on the application of (CdSe) ZnS Core Shell quantum dots decorated ZnO Nanowires (ZnONWs) and Nanobelts (NBs) in solar energy harvesting. Results indicate that both as grown and decorated ZnO Nanostructures are photoactive, have a fast response time and generate photocurrent under excitation in a photoelectrochemical cell setup. An order of magnitude enhancement in the photocurrent response of (CdSe) ZnS Core Shell quantum dots decorated ZnONBs is seen as compared to response from as grown ZnONBs. Generated photocurrent decreases with time but stabilizes at higher value for (CdSe) ZnS Core Shell quantum dots coated ZnONBs. Detailed performances of these devices are discussed.

Keywords

core/shellphotoconductivitynanostructure
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1302: Symposium W – Nanowires—Growth and Device Assembly for Novel Applications , 2012 , mrsf10-1302-w06-50
Copyright
Copyright © Materials Research Society 2011

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References

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