Low temperature cathodic electrodeposition of nanocrystalline zinc oxide thin films

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• 作者：Lisha Zhang ; Zhigang Chen ; Yiwen Tang and Zhijie Jia
• 关键词：Zinc oxide ; Electrodeposition ; Nanocrystalline ; Optical properties
• 刊名：Thin Solid Films
• 出版年：2005
• 期刊代码：78_00406090
• 类别：ph
• 出版时间：2005
• 卷：492
• 期：1-2
• 页码：24-29
• 文件大小：210 K

摘要

This paper investigates electrochemical behavior of ZnO thin films deposition on transparent conducting optically glass from a simple aqueous zinc nitrate solution. At low temperature, ZnO films with grain sizes between 10 and 15 nm are obtained by controlling growth rate. The X-ray diffraction pattern shows that ZnO film has a hexagonal wurtzite structure and the preferred growth orientation is the (002) direction. Detailed X-ray photoelectron spectroscopy analysis indicates the presence of metallic Zn, OH and H₂O species in the as prepared ZnO films. In addition, ZnO thin film changes from Zn-rich to O-rich after being annealed in air. Optical characterizations show that the films as prepared and annealed at 250 °C have high optical transmittance (> 90%) in the visible wavelength range and the band gap of the nanocrystalline ZnO films is 3.37 eV.