Studies on the Structure of Gel during Preparing ZnO Thin Films by Sol-gel Method |
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Authors: | QIN Xiu-Juan SUN Xue-Liang BU Li-Min ZUO Hua-Tong HANSI Hui-Zhi |
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Institution: | College of Environmental and Chemical Engineering, State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China |
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Abstract: | Transparent thin films of ZnO have been prepared on ordinary glass substrates by the inorganic sol-gel method using citric acid as chelating agent and zinc nitrate as the starting material.A novel structure on zinc citrate complex was put forward by using DTA-TG and FT-IR absorbance spectrum of citrate gels.Phase formation,morphology and optical properties of ZnO films are investigated by XRD,AFM and UV-vis transmittance spectra.The experimental results show that ZnO thin films derived from zinc citrate sol-gel method showed a (002) oriented hexagonal wurtzite structure,good crystalline property,a uniform range of grain size (40 nm),smooth surface of films,band gap of 3.28 eV and optical transmittances ratio over 90% in the visible range. |
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Keywords: | ZnO thin film inorganic complex sol-gel infrared spectra zinc citrate complex |
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