Influence of post-annealing temperature on properties of ZnO:Li thin films |
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Authors: | LL Chen HP He ZZ Ye YJ Zeng JG Lu BH Zhao LP Zhu |
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Institution: | State Key Laboratory of Silicon Materials, Department of Material Science and Engineering, Zhejiang University, Hangzhou 310027, People’s Republic of China |
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Abstract: | Li-doped ZnO thin films were prepared on glass substrates by DC reactive magnetron sputtering. The influence of post-annealing temperature on the electrical, structural, and optical properties of the films was investigated. A conversion from p-type conduction to n-type in a range of temperature was confirmed by Hall measurement. The optimal p-type conduction is achieved at the annealing temperature of 500 °C with a resistivity of 57 Ω cm, carrier concentration of 1.07 × 1017 cm?3 and Hall mobility of 1.03 cm2 V?1 s?1. From the temperature-dependent PL analysis, the energy level of LiZn acceptor was determined to be 140 meV above the valence band. |
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