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Type: Journal article
Title: Double open-circuit voltage of three-dimensional ZnO/CdTe solar cells by a balancing depletion layer
Author: Wang, J.
Ling, T.
Qiao, S.
Du, X.
Citation: ACS Applied Materials and Interfaces, 2014; 6(16):14718-14723
Publisher: American Chemical Society
Issue Date: 2014
ISSN: 1944-8252
Statement of
Jing-Jing Wang, Tao Ling, Shi-Zhang Qiao and Xi-Wen Du
Abstract: Three-dimensional (3D) heterojunction solar cells (HSCs) were fabricated by thermal deposition of a compact CdTe layer onto ZnO nanorods (NRs). Although the 3D architecture obviously improves the short-circuit current of HSCs, the open-circuit voltage is rather low, and this problem can be addressed by inserting an intermediate layer between ZnO NRs and the CdTe layer. On the basis of experimental and theoretical analyses, we found that the low open-circuit voltage mainly arose from the incomplete depletion layer and serious recombination of carriers at the CdTe/ZnO interface. The CdS intermediate layer can redistribute the depletion regions and eliminate the interface defects, thus remarkably improving the open-circuit voltage.
Keywords: Heterojunction solar cells; ZnO; CdTe; Intermediate layer; Open-circuit voltage; Depletion layer
Rights: © 2014 American Chemical Society
RMID: 0030015558
DOI: 10.1021/am5041219
Appears in Collections:Chemical Engineering publications

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