Oxide p‐n Heterojunction of Cu 2 O/ZnO Nanowires and Their Photovoltaic Performance

Oxide p‐n heterojunction devices consisting of p‐Cu 2 O/n‐ZnO nanowires were fabricated on ITO/glass substrates and their photovoltaic performances were investigated. The vertically arrayed ZnO nanowires were grown by metal organic chemical vapor deposition, which was followed by the electrodepositi...

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Bibliographic Details
Published in:Journal of nanomaterials 2013-01, Vol.2013 (1)
Main Authors: Baek, Seung Ki, Lee, Ki Ryong, Cho, Hyung Koun
Format: Article
Language:English
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Summary:Oxide p‐n heterojunction devices consisting of p‐Cu 2 O/n‐ZnO nanowires were fabricated on ITO/glass substrates and their photovoltaic performances were investigated. The vertically arrayed ZnO nanowires were grown by metal organic chemical vapor deposition, which was followed by the electrodeposition of the p‐type Cu 2 O layer. Prior to the fabrication of solar cells, the effect of bath pH on properties of the absorber layers was studied to determine the optimal condition of the Cu 2 O electrodeposition process. With the constant pH 11 solution, the Cu 2 O layer preferred the (111) orientation, which gave low electrical resistivity and high optical absorption. The Cu 2 O (pH 11)/ZnO nanowire‐based solar cell exhibited a higher conversion efficiency of 0.27% than the planar structure solar cell (0.13%), because of the effective charge collection in the long wavelength region and because of the enhanced junction area.
ISSN:1687-4110
1687-4129
DOI:10.1155/2013/421371