中国物理B ›› 2015, Vol. 24 ›› Issue (6): 67805-067805.doi: 10.1088/1674-1056/24/6/067805

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Influence factors and mechanism of emission of ZnS:Cu nanocrystals

楚学影a, 王欣浓a, 李金华a, 姚丹a, 方铉a b, 方芳a c, 魏志鹏b, 王晓华b   

  1. a School of Science, International Joint Research Center for Nanophotonics and Biophotonics, Changchun University of Science and Technology, Changchun 130022, China;
    b State Key Laboratory of High Power Semiconductor Lasers, Changchun University of Science and Technology, Changchun 130022, China;
    c Nanchang University, Nanchang 330047, China
  • 收稿日期:2014-11-19 修回日期:2015-01-15 出版日期:2015-06-05 发布日期:2015-06-05
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 61205193, 61204065, and 61307045), the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20112216120005), and the Developing Project of Science and Technology of Jilin Province, China (Grant Nos. 201201116, 20140520107JH, and 20140204025GX).

Influence factors and mechanism of emission of ZnS:Cu nanocrystals

Chu Xue-Ying (楚学影)a, Wang Xin-Nong (王欣浓)a, Li Jin-Hua (李金华)a, Yao Dan (姚丹)a, Fang Xuan (方铉)a b, Fang Fang (方芳)a c, Wei Zhi-Peng (魏志鹏)b, Wang Xiao-Hua (王晓华)b   

  1. a School of Science, International Joint Research Center for Nanophotonics and Biophotonics, Changchun University of Science and Technology, Changchun 130022, China;
    b State Key Laboratory of High Power Semiconductor Lasers, Changchun University of Science and Technology, Changchun 130022, China;
    c Nanchang University, Nanchang 330047, China
  • Received:2014-11-19 Revised:2015-01-15 Online:2015-06-05 Published:2015-06-05
  • Contact: Li Jin-Hua E-mail:jhli_cust@163.com
  • About author:78.67.-n; 78.55.Et; 68.35.bg
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 61205193, 61204065, and 61307045), the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20112216120005), and the Developing Project of Science and Technology of Jilin Province, China (Grant Nos. 201201116, 20140520107JH, and 20140204025GX).

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摘要： Copper-doped ZnS (ZnS:Cu) nanocrystals are synthesized by the sol–gel method. The average size of the ZnS:Cu nanocrystals is 3.1 nm. The x-ray diffraction indicates that increasing the Cu-dopant concentration results in a large shift in the diffraction angle. The effects of the dopant concentration, the reactant ratio, and aging temperature on the optical properties of the ZnS:Cu nanocrystals are also investigated. The fluorescence emission mechanism is analyzed by peak deconvolution using Gaussian functions. We find that the emission of the ZnS:Cu nanocrystal is composed of different luminescence centers at 430, 470, 490, 526, and 560 nm. The origins of these emissions are discussed and demonstrated by controlled experiments.

关键词: ZnS:Cu, luminescence, Gaussian fitting

Abstract: Copper-doped ZnS (ZnS:Cu) nanocrystals are synthesized by the sol–gel method. The average size of the ZnS:Cu nanocrystals is 3.1 nm. The x-ray diffraction indicates that increasing the Cu-dopant concentration results in a large shift in the diffraction angle. The effects of the dopant concentration, the reactant ratio, and aging temperature on the optical properties of the ZnS:Cu nanocrystals are also investigated. The fluorescence emission mechanism is analyzed by peak deconvolution using Gaussian functions. We find that the emission of the ZnS:Cu nanocrystal is composed of different luminescence centers at 430, 470, 490, 526, and 560 nm. The origins of these emissions are discussed and demonstrated by controlled experiments.

Key words: ZnS:Cu, luminescence, Gaussian fitting

中图分类号:  (Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures)

  • 78.67.-n
78.55.Et (II-VI semiconductors) 68.35.bg (Semiconductors)