| ZnCuInS量子点的变温光致发光 |
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| 引用本文： | 陈肖慧,王秀英,赵家龙.ZnCuInS量子点的变温光致发光[J].发光学报,2012,33(9):923-928. |
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| 作者姓名： | 陈肖慧 王秀英 赵家龙 |
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| 作者单位： | 1. 东北大学 理学院, 辽宁 沈阳 110819;2. 发光学与应用国家重点实验室 中国科学院长春光学精密机械与物理研究所, 吉林 长春 130033 |
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| 基金项目： | 国家自然科学基金(51102227)资助项目 |
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| 摘 要： | 测量了红色和深红色发光的ZnCuInS量子点在100~300 K温度范围内的光致发光光谱,研究了ZnCuInS量子点的发光机理,对ZnCuInS量子点的发光峰值能量、线宽和积分强度与温度的关系进行了细致的分析。在ZnCuInS量子点中观察到一种反常的发光峰值能量随着温度升高而增加的现象,同时发现ZnCuInS量子点的发光线宽很宽,约为300 meV,拟合积分强度与温度的关系曲线所得到的激活能为100 meV。这些结果表明,ZnCuInS量子点的发光不可能只来源于一种发光中心,而应该是来源于ZnCuInS量子点内部及表面的多种缺陷相关的多种发光中心组合。
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| 关 键 词： | ZnCuInS 量子点 纳米晶 变温光致发光 |
| 收稿时间： | 2012/6/6 |
Temperature-dependent Photoluminescence of ZnCuInS Quantum Dots |
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| CHEN Xiao-hui,WANG Xiu-ying,ZHAO Jia-long.Temperature-dependent Photoluminescence of ZnCuInS Quantum Dots[J].Chinese Journal of Luminescence,2012,33(9):923-928. |
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| Authors: | CHEN Xiao-hui WANG Xiu-ying ZHAO Jia-long |
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| Institution: | 1. School of Science, Northeast University, Shenyang 110016, China;2. State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China |
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| Abstract: | The photoluminescence(PL) spectra of ZnCuInS quantum dots(QDs) were measured in the temperature range from 100 to 300 K.The temperature dependences of the PL energy,linewidth,and intensity of the ZnCuInS QDs were investigated in detail.An anomalous increase in band gap of ZnCuInS QDs with temperature was observed.The full width at half maximum of the PL and thermal activation energy Ea of ZnCuInS QDs were 300 and 100 meV,respectively.These results suggested that the PL in the ZnCuInS QDs originated from the recombination of many kinds of defect-related emission centers in the interior and on the surface of the QDs. |
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| Keywords: | ZnCuInS quantum dots nanocrystals temperature-dependent photoluminescence |
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