Enhanced green photoluminescence from ZnO films prepared by TFA-MOD method

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• 作者：Youming Zou ; Yuxia Wang ; Zheng Chen ; Jianwen Wang and Yun Li
• 关键词：Zinc oxide films ; Trifluoroacetate metalorganic deposition ; Luminescence ; Defects
• 刊名：Materials Letters
• 出版年：2005
• 期刊代码：59_0167577x
• 类别：ms
• 出版时间：2005
• 卷：59
• 期：24-25
• 页码：3042-3045
• 文件大小：186 K

摘要

Preferentially (002) oriented ZnO films were prepared on Si (111) substrates at relatively low temperature by trifluoroacetate metalorganic deposition (TFA-MOD) method. The growth process, structure and photoluminescence properties were studied by thermogravimetric analysis, Fourier transform infrared absorption, X-ray diffraction, X-ray photoelectron spectra and photoluminescence. The green photoluminescence is enhanced remarkably and becomes visible by naked eyes with the formation of zinc silicate after 900 °C annealing. Furthermore, the oxygen partial pressure of annealing ambient also affects the green photoluminescence evidently. Our results support that oxygen antisite defect in ZnO is responsible for the green emission and a small amount of Zn₂SiO₄ can enhance the green emission.