| White Emitting ZnS Nanocrystals： Synthesis and Spectrum Characterization |
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| 引用本文： | 黄青松,董冬青,徐建萍,张晓松,张宏敏,李岚.White Emitting ZnS Nanocrystals： Synthesis and Spectrum Characterization[J].中国物理快报,2010(5):237-240. |
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| 作者姓名： | 黄青松 董冬青 徐建萍 张晓松 张宏敏 李岚 |
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| 基金项目： | Supported by the National Natural Science Foundation of China under Grant Nos 60877029, 60977035, 60907021 and 10904109, and the Natural Science Foundation of Tianjin under Grant Nos 09JCYBJC01400, 07JCYBJC06400 and the Natural Science Foundation of Tianjin Education Committee under Grant No 20071207. |
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| 摘 要： | Spherical organic-bonded ZnS nanocrystals with 4.0 4-0.2 nm in diameter are synthesized by a liquid-solid-solution method. The photoluminescence spectrum of sample （S^2-]/Zn^2＋] = 1.0） shows a strong white emission with a peak at 490nm and - 170 nm full widths at half maximum. By Gauss fitting, the white emission is attributed to the overlap of a blue emission and a green-yellow emission, originating from electronic transitions from internal S^2- vacancies level to valence band and to the internal Zn^2＋ vacancy level, respectively. After sealingZnS nanocrystals onto InGaN chips, the device shows CIE coordinates of （0.29,0.30）, which indicates their potential applications for white light emitting diodes.
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| 关 键 词： | 晶体合成 纳米晶 光谱表征 白色发光 ZnS 光致发光光谱 发光二极管灯 InGaN |
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