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Optical properties of ZnO thin film on γ-LiAlO2 substrate grown by pulsed laser deposition |
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| Authors: | Jun Zou Shengming Zhou Changtai Xia Fenglian Su Xiaomin Li |
| Affiliation: | a Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China b Graduate School of Chinese Academy of Science, Beijing 100039, China c Shanghai Institute of Ceramics, Chinese Academy of Science, Shanghai 200050, China d Anhui University, Anhui, 100086, China |
| Abstract: | Optical properties were investigated of ZnO thin films grown on (100) γ-LiAlO2 (LAO) substrates by pulsed laser deposition method. C-axis oriented ZnO film was grown on (100) LAO substrate at the substrate temperature of 550 °C. The transmittances of the films were over 85%. Peaks attributed to excitons were seen in the absorption spectra, indicating that the thin films have high crystallinity. Photoluminescence spectra were observed at room temperature; the peak at 550 nm is ascribed to oxygen vacancies in the ZnO films caused by the diffusion of Li from the substrate into the film during deposition. |
| Keywords: | 81 15 68 55J 78 55 73 50 |
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