Electrodeposition and characterization of nanocrystalline cuprous oxide thin films on TiO₂ films

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• 作者：Tang ; Yiwen ; Chen ; Zhigang ; Jia ; Zhijie ; Zhang ; Lisha ; Li ; Jialin
• 关键词：Cuprous oxide films ; Electrodeposition ; Nanocrystalline ; TiO₂ film
• 刊名：Materials Letters
• 出版年：2005
• 期刊代码：59_0167577x
• 类别：ms
• 出版时间：February, 2005
• 卷：59
• 期：4
• 页码：434-438
• 文件大小：287 K

摘要

The grain size in cuprous oxide (Cu₂O) thin films is a key to improve the performance of solar application devices. In this paper, electrochemical deposition of nanocrystalline Cu₂O thin films on TiO₂ films coated on transparent conducting optically (TCO) glass substrates by cathodic reduction of cupric acetate has been investigated. The deposition kinetics of nanocrystalline Cu₂O thin films were studied and the parameters limiting the deposition of the films were determined. Pure Cu₂O deposited at bath temperature between 0 and 30 脗脗C produced spherically shaped grains with 40脗脗脗50 nm diameters which have not been reported previously. The effect of pH was studied and a solution with a pH between 5.5 and 6 was found to be best. The effect of annealing on bulk structure, electrical resistivity, and optical absorption of nanocrystalline Cu₂O thin films was also studied and the results were discussed.