| 表面配体对CdSe量子点发光性质的影响 |
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| 引用本文： | 侯元晖,朱东亮,彭颖,陈志良,翟彩华,杨梦丽,张志凌,林毅.表面配体对CdSe量子点发光性质的影响[J].分析科学学报,2017,33(4). |
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| 作者姓名： | 侯元晖 朱东亮 彭颖 陈志良 翟彩华 杨梦丽 张志凌 林毅 |
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| 作者单位： | 生物医学分析化学教育部重点实验室,武汉大学化学与分子科学学院,湖北武汉430072 |
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| 摘 要： | 本文采用热注入法合成了以油胺/油酸为表面配体的、粒径均一的CdSe量子点(CdSe QDs)。调节表面配体交换中辛硫醇与CdSe QDs的比例,研究了表面配体对CdSe QDs光致发光及电致化学发光性质的影响,并提出了CdSe QDs的发光模型。结果表明,辛硫醇表面配体显著影响CdSe QDs的带边发射和深能级陷阱发射,因而导致CdSe QDs光致发光强度的显著降低,以及电致化学发光强度的增加。上述结果为进一步提高量子点的发光性能提供了依据。
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| 关 键 词： | 量子点 表面配体 光致发光 电致化学发光 |
Effects of Surface Ligands on Luminescent Property of CdSe Quantum Dots |
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| HOU Yuan-hui,ZHU Dong-liang,PENG Ying,CHEN Zhi-liang,ZHAI Cai-hua,YANG Meng-li,ZHANG Zhi-ling,LIN Yi.Effects of Surface Ligands on Luminescent Property of CdSe Quantum Dots[J].Journal of Analytical Science,2017,33(4). |
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| Authors: | HOU Yuan-hui ZHU Dong-liang PENG Ying CHEN Zhi-liang ZHAI Cai-hua YANG Meng-li ZHANG Zhi-ling LIN Yi |
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| Abstract: | Homogeneous CdSe quantum dots (QDs) capped with oleylamine and oleic acid are synthesized by thermal injection method.Effects of surface ligands on both photoluminescence (PL) and electrochemiluminescence (ECL) properties of CdSe QDs are investigated by adjusting the ratio of 1-octanethiol to CdSe QDs during ligand exchange,with a model of the luminescence mechanism from CdSe QDs proposed.Results show that surface ligand 1-octanethiol strongly affects both the band edge emission and the deep trap emission of CdSe QDs,resulting in a significant reduce in the PL intensity and the corresponding increase in ECL intensity.These results offer a basis for further improving the luminescent properties of quantum dots. |
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| Keywords: | Quantum dots Surface ligand Photoluminescence Electrochemiluminescence |
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