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Transport and surface conductivity in ZnO

Published online by Cambridge University Press:  22 May 2012

Craig H. Swartz
Craig H. Swartz*
Affiliation:
Materials Science, Engineering, and Commercialization Program, Texas State University, San Marcos, Texas 78666
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

Control of the electrical properties of ZnO is difficult to achieve. Doping is affected by the presence of a n-type background. Magnetotransport measurements can extract detailed information on donors and acceptors, but characterization is complicated by effects such as the surface conductivity. This conducting layer can be activated by ambient illumination or by heating in the absence of oxygen. There are considerable differences in the behavior of the various polar and nonpolar crystal faces. This paper provides an overview of the properties of ZnO surface conductivity, as well as the methods which have been implemented to account for it while interpreting carrier transport measurements.

Type
Reviews
Information
Journal of Materials Research , Volume 27 , Issue 17: Focus Issue: Oxide Semiconductors , 14 September 2012 , pp. 2205 - 2213
Copyright
Copyright © Materials Research Society 2012

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