Synthesis and photoluminescent properties of core/shell structure ZnS:Cu/ZnS quantum dots

被引：1

作者：

Tian, Xin ^{[1
]}

Cao, Li-Xin ^{[1
]}

Liu, Wei ^{[1
]}

Su, Ge ^{[1
]}

Dong, Bo-Hua ^{[1
]}

机构：

[1] Institute of Materials Science and Engineering, Ocean University of China

来源：

Faguang Xuebao/Chinese Journal of Luminescence | 2012年 / 33卷 / 07期

关键词：

Core/shell structure; Luminescence; Quantum dots; ZnS:Cu;

D O I：

10.3788/fgxb20123307.0736

中图分类号：

学科分类号：

摘要：

ZnS:Cu quantum dots have been synthesised via a water-soluble route, then the ZnS shell coated for surface modification. The influence of shell thickness on the optical properties of ZnS:Cu quantum dots has been studied. The samples were characterized by TEM, XRD, PL, PLE and UV-Vis. The results showed that the ZnS:Cu/ZnS quantum dots were cubic sphalerite, uniform spherical-shaped and had a narrow size distribution. The average particals size increased from 2 nm to 3.2 nm after the shell modification. The PLE and UV-Vis spectra showed a gradual red shift with the shell thickening, which suggested that the quantum dots was growing with the n s/n c increased. It can proved that the ZnS shell growed on the ZnS:Cu quantum dots surface and formed the ZnS:Cu/ZnS core/shell structure quantum dots. The PL intensity related with Cu 2+ increased at the beginning and decreased with further growth of the ZnS shell. The intensity of emission peak achieved the maximum when n s/n c=2.5.

引用

页码：736 / 741

页数：5

共 10 条

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