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Highly Dense ZnO Nanowires Grown on Graphene Foam for Ultraviolet Photodetection

Boruah, Buddha Deka and Mukherjee, Anwesha and Sridhar, S and Misra, Abha (2015) Highly Dense ZnO Nanowires Grown on Graphene Foam for Ultraviolet Photodetection. In: ACS APPLIED MATERIALS & INTERFACES, 7 (19). pp. 10606-10611.

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Official URL: http://dx.doi.org/ 10.1021/acsami.5b02403

Abstract

Growth of highly dense ZnO nanowires (ZnO NWs) is demonstrated on three-dimensional graphene foam (GF) using resistive thermal evaporation technique. Photoresponse of the as-grown hybrid structure of ZnO NWs on GF (ZnO NWs/GF) is evaluated for ultraviolet (UV) detection. Excellent photoresponse with fast response and recovery times of 9.5 and 38 s with external quantum efficiency of 2490.8% is demonstrated at low illumination power density of 1.3 mW/cm(2). In addition, due to excellent charge carrier transport, mobility of graphene reduces the recombination rate of photogenerated charge carriers, hence the lifetime of photogenerated free charge carriers enhances in the photodetectors.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the AMER CHEMICAL SOC, 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
Keywords: Zinc oxide; nanowire; graphene foam; heterostructure; photodetector
Department/Centre: Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics
Depositing User: Id for Latest eprints
Date Deposited: 26 Jun 2015 05:44
Last Modified: 26 Jun 2015 05:44
URI: http://eprints.iisc.ac.in/id/eprint/51768

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