| CdSe/CdS核壳纳米晶微波水热法一步合成与发光光谱分析 |
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| 引用本文： | 朱明雪,徐建萍,张晓松,石庆良,李霖霖,刘晓娟,石鑫,王亚中,魏行远,李岚.CdSe/CdS核壳纳米晶微波水热法一步合成与发光光谱分析[J].发光学报,2014,35(8):950-955. |
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| 作者姓名： | 朱明雪 徐建萍 张晓松 石庆良 李霖霖 刘晓娟 石鑫 王亚中 魏行远 李岚 |
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| 作者单位： | 天津理工大学 材料物理研究所, 光电器件与显示材料教育部重点实验室, 天津 300384 |
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| 基金项目： | 天津市自然科学基金(11JCYBJC00300,14JCZDJC31200); 国家高技术研究发展计划(2013AA014201)资助项目 |
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| 摘 要： | 采用微波水热法一步合成了核壳结构的CdSe/CdS纳米晶，讨论了巯基丙酸中S2-的释放过程对纳米晶生长的影响。XRD和Raman光谱结果表明，140℃合成温度下获得了CdSe/CdS核壳结构的纳米晶。FTIR光谱结果表明，巯基丙酸随时间的分解有助于CdS壳层的形成。PL光谱呈现出CdSe纳米晶的带间发射和缺陷发射，随着核壳结构的形成，CdSe纳米晶的表面缺陷被抑制，相关的荧光发射减弱。
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| 关 键 词： | 微波水热法 核壳纳米晶 生长机理 发光光谱 |
| 收稿时间： | 2014/4/15 |
One-step Preparation of CdSe/CdS Core-shell Nanocrystals by Microwave Hydrothermal Method and Photoluminescence Spectra Analysis |
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| ZHU Ming-xue,XU Jian-ping,ZHANG Xiao-song,SHI Qing-liang,LI Lin-lin,LIU Xiao-juan,SHI Xin,WANG Ya-zhong,WEI Xing-yuan,LI Lan.One-step Preparation of CdSe/CdS Core-shell Nanocrystals by Microwave Hydrothermal Method and Photoluminescence Spectra Analysis[J].Chinese Journal of Luminescence,2014,35(8):950-955. |
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| Authors: | ZHU Ming-xue XU Jian-ping ZHANG Xiao-song SHI Qing-liang LI Lin-lin LIU Xiao-juan SHI Xin WANG Ya-zhong WEI Xing-yuan LI Lan |
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| Institution: | Institute of Material Physics, Key Laboratory of Display Materials and Photoelectric Devices, Ministry of Education, Tianjin University of Technology, Tianjin 300384, China |
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| Abstract: | CdSe/CdS core-shell nanocrystals were one-step prepared by microwave-hydrothermal method. The growth mechanism of nanoparticles was discussed and attributed to the sulfur release process from mercaptopropionic acid. The results from XRD and Raman spectra suggested that the core-shell CdSe/CdS nanocrystals were obtained under the reaction temperature of 140℃. FTIR spectra were in situ monitored for the decomposition of mercaptopropionic acid upon reaction time, which contributed to the formation of CdS shells. The band-related and trap states fluorescent emission from nanocrystals were both observed in PL spectra. The increased band related emission intensity further verified the formation of core/shell structure of CdSe nanocrystals. |
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| Keywords: | microwave-hydrothermal method core-shell nanocrystals growth mechanism emission spectrum |
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