| CuInS2纳米晶的制备和发光性质 |
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| 引用本文： | 王秀英,刘学彦,赵家龙.CuInS2纳米晶的制备和发光性质[J].发光学报,2012,33(1):7-11. |
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| 作者姓名： | 王秀英 刘学彦 赵家龙 |
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| 作者单位： | 发光学及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(60976049); 国家青年科学基金(51102227)资助项目 |
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| 摘 要： | 以十二硫醇为溶剂,通过选择合适的金属源制备了各种尺寸的CuInS2量子点。观察到随着粒子的尺寸减小,其吸收和发光光谱明显蓝移,存在明显的量子尺寸效应。通过在CuInS2纳米晶表面包覆ZnS壳层,发现随着壳层厚度增加,其发光量子效率明显提高,最大达到了48%;继续增加壳层厚度,其发光量子效率反而降低。进一步测量它们的荧光寿命,发现包覆ZnS壳层后的CuInS2纳米晶的荧光寿命明显增加,证实表面包覆明显减少其表面的无辐射复合中心,提高了其发光效率。进一步制备了CuInS2/ZnS核壳量子点发光二极管,并对其电致发光性质进行了研究。
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| 关 键 词： | CuInS2 量子点 纳米晶 发光二极管 |
| 收稿时间： | 2011-08-16 |
| 修稿时间： | 2011-10-19 |
Synthesis and Luminescence Properties of CuInS2 Nanocrystals |
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| WANG Xiu-ying,LIU Xue-yan,ZHAO Jia-long.Synthesis and Luminescence Properties of CuInS2 Nanocrystals[J].Chinese Journal of Luminescence,2012,33(1):7-11. |
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| Authors: | WANG Xiu-ying LIU Xue-yan ZHAO Jia-long |
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| Institution: | 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: | CuInS2 nanocrystals were prepared by heating inorganic metal salt and dodecanethiol. It was found that absorption edge and photoluminescence peak shifted to shorter wavelength with decreasing the nanocrystal size due to quantum size effect. The overgrowth of as-prepared nanocrystals with a few monolayers of ZnS shell improved the photoluminescence quantum efficiency up to 48%. Further photoluminescence decays of CuInS2 nanocrystals were measured at room temperature. CuInS2/ZnS core/shell nanocrystals exhibited a longer photoluminescence lifetime, compared with the naked CuInS2 nanocrystals. This is because the surface coating of the ZnS shell passiviated the defects on the surface of CuInS2 nanocrystals and improved the photoluminescence quantum yield. Finally, CuInS2/ZnS core/shell quantum dot light emitting diodes were fabricated and their electroluminescence properties were studied. |
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| Keywords: | CuInS2 quantum dots nanocrystals light-emitting diodes |
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