| Ultraviolet Luminescence in Mg0.12Zn0.88O Alloy Films |
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| 作者姓名： | 吴春霞 吕有明 申德振 魏志鹏 张振中 李炳辉 张吉英 刘益春 范希武 |
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| 作者单位： | [1]Kay Laboratory of Excited State Processes, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033 [2]Graduate School of Chinese Academy of Sciences, Beijing 100049 [3]Department of Science, Changchun University of Science and Technology, Changchun 130022 |
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| 基金项目： | Supported by the High-Technology Research and Development Programme of China under Grant No 2001AA31112, Key Project of the National Natural Science Foundation of China under Grant No 60336020, the Knowledge Innovation Project of Chinese Academy of Sciences, the National Natural Science Foundation of China under Grant Nos 60278031, 60176003, and 60376009. |
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| 摘 要： | We investigate the origin of ultraviolet （UV） emission from Mg0.12 Zn0.88 O alloy thin films with a wurtzite structure fabricated on c-plane Al2O3 substrates by plasma assisted molecular beam epitaxy. At room temperature, the absorption edge and UV emission band of the Mg0.12Zn0.88O film shift to high-energy side compared with ZnO films. Temperature dependence of the photoluminescence spectra shows that the UV emission is composed of free exciton and neutral donor bound exciton emissions. Two-step dissociation processes of the UV emission are observed with the increasing temperature. The thermal quenching mechanism is attributed to the dissociation of the free exciton from the neutral donor bound exciton in the low temperature region and the dissociation of free electron and hole from the free exciton in the high temperature region.
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| 关 键 词： | Mg0.12Zn0.88O 合金薄膜 紫外线发光 纤维结构 能量吸收 |
| 收稿时间： | 2005-04-08 |
| 修稿时间： | 2005-04-08 |
Ultraviolet Luminescence in Mg0.12Zn0.88O Alloy Films |
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| Wu ChunXia;Lv YouMing;Shen DeZhe;Wei ZhiPeng;Zhang ZheZhong;Li BingHui;Zhang JiYing;Liu YiChun;Fan XiWu.Ultraviolet Luminescence in Mg0.12Zn0.88O Alloy Films[J].Chinese Physics Letters,2005,22(10):2655-2658. |
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| Authors: | Wu ChunXia;Lv YouMing;Shen DeZhe;Wei ZhiPeng;Zhang ZheZhong;Li BingHui;Zhang JiYing;Liu YiChun;Fan XiWu |
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