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Journal of Nanomaterials
Volume 2012 (2012), Article ID 192456, 8 pages
http://dx.doi.org/10.1155/2012/192456
Research Article

Evaluation of CdS Interfacial Layers in ZnO Nanowire/Poly(3-Hexylthiophene) Solar Cells

The University of Texas at Dallas, 800 West Campbell Road, Richardson, TX 75080-3021, USA

Received 26 February 2012; Accepted 17 April 2012

Academic Editor: Sevan P. Davtyan

Copyright © 2012 John W. Murphy et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We prepare ZnO:poly(3-hexylthiophene) (P3HT) thin-film solar cells and ZnO nanowire:P3HT nanostructured solar cells and evaluate the effect of adding an interfacial layer between the ZnO and P3HT as a function of the nanowire height. We evaluate several different interlayers of CdS deposited, using two different chemical bath deposition (CBD) recipes. The height of the nanowire array is varied from a bilayer device with no nanowires up to arrays with a height of 2 μm. We find that achieving a conformal coating of the ZnO with the interfacial layer is critical to improve device performance and that CBD can be used to grow conformal films on nonuniform surfaces.