Effect of annealing temperature on the structural and optical properties of ZnO thin films prepared by sol–gel method |
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Authors: | Yidong Zhang Wenjun Fa Fengling Yang Zhi Zheng and Pingyu Zhang |
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Institution: | (1) Institute of Surface Micro and Nano Materials, Xuchang University, Xuchang, 461000, People’s Republic of China;(2) Key Laboratory of Ministry of Education for Special Functional Materials, Henan University, Kaifeng, 475004, People’s Republic of China; |
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Abstract: | In this work, ZnO thin films were synthesized by sol–gel method on glass substrates followed by calcinations on different
temperatures. The effect of annealing temperature on the structure and optical properties of the films was studied. The structural
characteristics of the samples were analyzed by X-ray diffraction and atomic force microscope. The optical properties were
studied by a UV-visible spectrophotometer. The results show that all the prepared ZnO thin films have a high preferential
oriented c-axis orientation with compact hexagonal wurtzite structure. With the increasing annealing temperature (mse.ufl.edu), the
intensity of (002) peak, particle size, surface RMS roughness, and absorbance of the ZnO thin films were increased as well.
On the contrary, the transmittance and optical band gaps were decreased. |
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Keywords: | |
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