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Proceedings Paper

Morphological effects on optical and electrical properties of ZnO nanostructures
Author(s): Sang Hyun Lee; Jun Xu
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Paper Abstract

Morphology control of semiconductor nanostructures is of great interest in recent years owing to their unique capabilities in achieving desired chemical and physical properties as well as enabling great potential in electronic and optoelectronic applications. In this paper, we review our recent study on morphological control of ZnO nanocones and how the optical and electrical properties of such nanostructure-based photovoltaic solar cells are affected. The nanocone shape is obtained by altering the ratio of oxygen to argon gas during thermal chemical vapor deposition. The nanocones grown on Si substrates show antireflective properties in a broad spectral range. We further found that incident light was confined in the nanocones, which enhances the antireflective properties through multi-reflection/absorption. The performance dependency of a ZnO-CdTe solar cell on the morphology of ZnO was explored by introducing the nanocones. Small junction area and strong electric field at the tip of nanocones contribute to effective charge transport across the heterojunction, resulting in improved the conversion efficiency of solar cells.

Paper Details

Date Published: 29 February 2012
PDF: 7 pages
Proc. SPIE 8263, Oxide-based Materials and Devices III, 82631H (29 February 2012); doi: 10.1117/12.910950
Show Author Affiliations
Sang Hyun Lee, Oak Ridge National Lab. (United States)
Jun Xu, Oak Ridge National Lab. (United States)

Published in SPIE Proceedings Vol. 8263:
Oxide-based Materials and Devices III
Ferechteh H. Teherani; David C. Look; David J. Rogers, Editor(s)

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