Journal
ELECTROCHIMICA ACTA
Volume 74, Issue -, Pages 73-77Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2012.03.165
Keywords
Zinc oxide; Copper institution; Nanorods; Photoelectrochemical
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Funding
- National Dong Hwa University
- National Science Council of the Republic of China, Taiwan [NSC 100-2221-E-259-017]
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Ternary Zn1-xCuxO nanorods with a controllable optical band gap were fabricated by a simple electrochemical route. XRD confirmed that crystalline nanorods with copper concentrations from 1% to 10% had a hexagonal wurtzite structure. The incorporation of copper in the ZnO matrix, the amount of which was determined using XPS, red-shifted the absorption edge of the Zn1-xCuxO nanorods to an extent that was proportional to the copper content. Photoelectrochemical (PEC) measurements clearly revealed that the Zn1-xCuxO nanorods increased the photocoversion efficiency to 2 times that of pure ZnO, and they exhibited a greater photoresponse to visible light because of the band gap narrowing effect. Hence, the Zn1-xCuxO with narrowing band gap illustrated great potential for large light-harvesting device. Crown Copyright (C) 2012 Published by Elsevier Ltd. All rights reserved.
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