期刊
VACUUM
卷 66, 期 3-4, 页码 511-515出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0042-207X(02)00124-0
关键词
conductive transparent film; ZnO : Al; impurity contamination; annealing
Influence of Co, Mn and Cr contaminants were investigated in transparent conductive ZnO:Al films in the co-sputtering of ZnO:Al and Zn targets. The addition of extra Zn in this process was effective in decreasing film resistivity. However, the resistivity of as-grown ZnO film showed a rapid increase at 100degreesC annealing in air. This was attributed to the incorporation of oxygen at boundaries of columnar micro crystals of ZnO:Al. The inclusion of contaminants such as Co, Mn and Cr was observed to cancel the Zn-doping effect for as-grown ZnO:Al films, but stabilized the resistivity change under oxygen exposure. The film with Cr doping was stable below 400degreesC, and showed nearly a constant of about 7 x 10(-4) Omega cm. (C) 2002 Elsevier Science Ltd. All rights reserved.
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