期刊
THIN SOLID FILMS
卷 517, 期 4, 页码 1474-1477出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.tsf.2008.09.059
关键词
Transparent electrode; ZnO; Thin film; Magnetron sputtering
类别
资金
- Rare Metal Substitute Materials Development Project
- Ministry of Economy
This paper surveys the recent progress and prospects for further development of indium-tin-oxide (ITO) substitute materials for practical use as thin-film transparent electrodes. The best, and only practical, indium-free candidate for an alternative material to ITO is impurity-doped ZnO such as Al- or Ga-doped ZnO (AZO or GZO). Presented here are newly developed impurity-doped ZnO thin-film deposition techniques, suitable for practical use, that reduce resistivity as well as improve the uniformity of the resistivity distribution using oxidization-suppressing magnetron sputtering deposition methods. Also presented are descriptions concerning the observed increase in resistivity of impurity-doped ZnO thin films resulting from exposure to long-term testing in a high humidity environment (air at 90% relative humidity and 60 degrees C) as well as the increase in resistivity associated with a decrease of film thickness. The resistivity stability of AZO thin films could be considerably improved by co-doping another impurity. (c) 2008 Elsevier B.V. All rights reserved.
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