| Luminescence with Local Distribution and Its Possible Mechanism in Zinc Oxide Micro-Crystallites |
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| 引用本文： | 施媛媛 田珂 林碧霞 傅竹西. Luminescence with Local Distribution and Its Possible Mechanism in Zinc Oxide Micro-Crystallites[J]. 中国物理快报, 2007, 24(8): 2398-2400 |
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| 作者姓名： | 施媛媛 田珂 林碧霞 傅竹西 |
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| 作者单位： | Department of Physics, University of Science and Technology of China, Hefei 230026 |
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| 基金项目： | Supported by the National Natural Science Foundation of China under Grant Nos 50472009, 50532070 and 10474091. |
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| 摘 要： | The spatial luminescence distribution hi the ZnO micro-crystallite fihns deposited on silicon substrates by CVD at room tempezature is investigated by the cathedolumineseence （CL） image. It has been observed that the CL image of the samples constitutes a certain pattern. The UV emission pattern projective to the （0001） face of ZnO grains consists of a series of lines nearby the grain boundaries . The included angles between any two adjacent lines are almost 120°. What is more, some luminescent lines form a close hexagon similar to ZnO crystalline structure. Such a local distribution propety shows that the UV emission on as-grown ZnO crystallite should be due to some local defects congregated to {1010} facets of ZnO grain rather than free exciton recombination.
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| 关 键 词： | 氧化锌 发光性 微粒晶 性能 |
| 收稿时间： | 2007-04-12 |
| 修稿时间： | 2007-04-12 |
Luminescence with Local Distribution and Its Possible Mechanism in Zinc Oxide Micro-Crystallites |
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| SHI Yuan-Yuan,TIAN Ke,LIN Bi-Xia,FU Zhu-Xi. Luminescence with Local Distribution and Its Possible Mechanism in Zinc Oxide Micro-Crystallites[J]. Chinese Physics Letters, 2007, 24(8): 2398-2400 |
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| Authors: | SHI Yuan-Yuan TIAN Ke LIN Bi-Xia FU Zhu-Xi |
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| Affiliation: | Department of Physics, University of Science and Technology of China, Hefei 230026 |
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| Abstract: | The spatial luminescence distribution in the ZnO micro-crystallite films deposited on silicon substrates by CVD at room temperature is investigated by the cathedoluminescence (CL) image. It has been observed that the CL image of the samples constitutes a certain pattern. The UV emission pattern projective to the (0001) face of ZnO grains consists of a series of lines nearby the grain boundaries .The included angles between any two adjacent lines are almost 120°. What is more, some luminescent lines form a close hexagon similar to ZnOcrystalline structure. Such a local distribution property shows that the UV emission on as-grown ZnO crystallite should be due to some localdefects congregated to {1010} facets of ZnO grain rather than free exciton recombination. |
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| Keywords: | 78.68.+m 78.66.Hf |
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