| CdZnTe晶体光致发光谱"负热淬灭"现象研究 |
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| 引用本文： | 王涛,俞鹏飞,徐亚东,查钢强,傅莉,介万奇.CdZnTe晶体光致发光谱"负热淬灭"现象研究[J].人工晶体学报,2010,39(1):106-109. |
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| 作者姓名： | 王涛 俞鹏飞 徐亚东 查钢强 傅莉 介万奇 |
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| 作者单位： | 西北工业大学凝固技术国家重点实验室,西安,710072 |
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| 基金项目： | 国家自然科学基金(No.50902114,50772091) |
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| 摘 要： | 采用改进的垂直布里奇曼法生长了直径为60 mm的CdZnTe晶体,测试了其在10 K～150 K范围的PL谱.对760 nm和825 nm处的峰积分强度随温度变化关系进行研究发现,在30～50 K范围内,PL谱峰的强度呈现反常温度依赖现象,即随着温度的升高而减小,也就是所谓的"负热淬灭"现象,这在CdZnTe晶体中属首次观察到.进一步分析表明,随着温度的增加,其PL谱强度变化的过程包含了三个无辐射过程和一个负热淬灭过程.与没有发生"负热淬灭"现象的CdZnTe晶体对比,两者XRD图谱呈现明显差异.讨论了发生负热淬灭现象的原因以及可能路径.
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| 关 键 词： | CdZnTe PL谱 负热淬灭 |
Study on Negative Thermal Quenching of PL in CdZnTe Crystal |
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| WANG Tao,YU Peng-fei,XU Ya-dong,ZHA Gang-qiang,FU Li,JIE Wan-qi.Study on Negative Thermal Quenching of PL in CdZnTe Crystal[J].Journal of Synthetic Crystals,2010,39(1):106-109. |
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| Authors: | WANG Tao YU Peng-fei XU Ya-dong ZHA Gang-qiang FU Li JIE Wan-qi |
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| Affiliation: | State Key Laboratory of Solidification Processing;Northwestern Polytechnical University;Xi'an 710072;China |
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| Abstract: | Photoluminescence (PL) spectroscopy was carried out on CdZnTe crystal grown by Modified Vertical Bridgman method,with temperature from 10 K to 150 K.Abnormal temperature dependent PL intensity were observed from 30 K to 50 K,which is the so-called "negative thermal quenching".Three non-radiative processes and one negative thermal quenching process were identified.The difference of XRD spectra between CdZnTe crystals with and without negative thermal quenching behaviors gives a possible explanation on its or... |
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| Keywords: | CdZnTe PL spectroscopy negative thermal quenching |
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