ZnO-coated CuO nanowire arrays: fabrications, optoelectronic properties, and photovoltaic applications

We report a growth of p-CuO nanowire arrays with a simple thermal oxidation and a fabrication of nanowire-based heterojunctions by coating the p-CuO nanowire arrays in an n-ZnO layer through a thermal decomposition method. Their optoelectronic properties and photovoltaic performance were investigate...

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Bibliographic Details
Published in:Optics express 2011-06, Vol.19 (12), p.11271-11279
Main Authors: Wang, Peng, Zhao, Xinhong, Li, Baojun
Format: Article
Language:English
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Summary:We report a growth of p-CuO nanowire arrays with a simple thermal oxidation and a fabrication of nanowire-based heterojunctions by coating the p-CuO nanowire arrays in an n-ZnO layer through a thermal decomposition method. Their optoelectronic properties and photovoltaic performance were investigated. Compared with the conductance in the dark, a 154% increase in photoconductance was obtained under a white light illumination of 100 mW/cm2. The heterojunctions exhibit an obvious photocurrent increment of 0.264 mA under the illumination of 141 mW/cm2. After annealing the heterojunctions at 100°C for 25 min, a larger open-circuit voltage of 0.37 V was obtained, the short-circuit current density increase to 0.63 mA/cm2 from original 0.49 mA/cm2. The overall power conversion efficiency is 0.1%.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.19.011271