Preparation of Zn1-xMgxO films by radio frequency magnetron sputtering

被引:334
作者
Minemoto, T [1 ]
Negami, T [1 ]
Nishiwaki, S [1 ]
Takakura, H [1 ]
Hamakawa, Y [1 ]
机构
[1] Matsushita Elect Ind Co Ltd, Adv Technol Res Labs, Seika, Kyoto 6120237, Japan
关键词
zinc oxide; magnesium; sputtering; solar cells;
D O I
10.1016/S0040-6090(00)01009-9
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
II-VI widegap semiconductors such as ZnO are widely utilized in various electronic and optical devices. To widen the band gap of ZnO, we conducted a systematic investigation of solid solution thin films of Zn1-xMgxO, a group of ternary compounds of the Zn-Mg-O system. We prepared the thin films by radio frequency (RF) magnetron co-sputtering on fused silica substrates at room temperature. The thin films were a single phase of Zn1-xMgxO having the basic structure of ZnO at x less than or equal to 0.46 and the basic structure of MgO at x greater than or equal to 0.62, with segregation of the ZnO and MgxO phases at x = 0,58. The band gap of Zn1-xMgxO having the basic structure of ZnO increased from 3.24 eV at x = 0 (ZnO) to 4.20 eV at x = 0.46. Transmittances of Zn1-xMgxO thin films were nearly equivalent to those of ZnO. Zn1-xMgxO has a wider band gap than ZnO and can be expected to provide a useful window layer of solar cells that improves the overall efficiency by decreasing the absorption loss. (C) 2000 Elsevier Science S.A. AU rights reserved.
引用
收藏
页码:173 / 176
页数:4
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