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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >A facile method to synthesize high-quality ZnS(Se) quantum dots for photoluminescence
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A facile method to synthesize high-quality ZnS(Se) quantum dots for photoluminescence

机译：合成用于光致发光的高质量ZnS（Se）量子点的简便方法

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摘要

Colloidal zinc sulfide (ZnS) quantum dots are synthesized by a solvothermal route from Zn(Ac)_2-2H_2O, sulfur powder and oleylamine at 120-240 °C. Microstructural, morphological, and optical properties of the as-synthesized ZnS quantum dots are characterized by X-ray diffraction analysis, transmission electron microscopy, UV-vis absorption spectroscopy, and photoluminescence spectroscopy. Results indicate that the obtained ZnS quantum dots distribute uniformly, the particle size is in the range between 1.7 nm and 3.1 nm, and the band gap decreases from 4.16 eV to 3.90 eV with an increase of the particle size. The size-dependent photoluminescence exhibits a strongly broadened peak accompanied by a pronounced blue-shift. It is also found that the size of the ZnS nanocrystals can be effectively controlled by adjusting synthesis temperature. It is shown that the present method is also applicable to synthesize other binary II-VI semiconductor materials, such as ZnSe quantum dots.
机译：胶体硫化锌（ZnS）量子点是通过溶剂热法由Zn（Ac）_2-2H_2O，硫粉和油胺在120-240°C合成的。合成后的ZnS量子点的微观结构，形态和光学性质通过X射线衍射分析，透射电子显微镜，紫外可见吸收光谱和光致发光光谱来表征。结果表明，所获得的ZnS量子点分布均匀，粒径在1.7 nm至3.1 nm之间，并且随着粒径的增加，带隙从4.16 eV降低到3.90 eV。尺寸依赖性光致发光显示出强烈加宽的峰，并伴有明显的蓝移。还发现通过调节合成温度可以有效地控制ZnS纳米晶体的尺寸。结果表明，本方法还可用于合成其他二元II-VI半导体材料，例如ZnSe量子点。

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