Oxide p-n Heterojunction of Cu2O/ZnO Nanowires and Their Photovoltaic Performance. (23rd September 2013)

• Record Type: Journal Article
• Authors: Baek, Seung Ki; Lee, Ki Ryong; Cho, Hyung Koun
• Other Names: Ma Renzhi Academic Editor.
• Is Part Of: Journal of nanomaterials. Volume 2013(2013)
• Publication Date: 2013-09-23
• Subjects: Nanostructured materials -- Periodicals; Nanotechnology -- Periodicals; Nanomatériaux; Nanostructured materials; Nanotechnology; Nanostructures; Nanotechnology; Periodicals; Fulltext; Internet Resources; Periodicals; 620.115
• DOI: 10.1155/2013/421371
• Languages: English
• ISSNs: 1687-4110

Abstract

Abstract : Oxide p-n heterojunction devices consisting of p-Cu2 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 Cu2 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 Cu2 O electrodeposition process. With the constant pH 11 solution, the Cu2 O layer preferred the (111) orientation, which gave low electrical resistivity and high optical absorption. The Cu2 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.