Synthesis and Photoluminescent Properties of Core/Shell Structure ZnS∶Cu/ZnS Quantum Dots

TIAN Xin; CAO Li-xin; LIU Wei; SU Ge; DONG Bo-hua

doi:10.3788/fgxb20123307.0736

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Synthesis and Photoluminescent Properties of Core/Shell Structure ZnS∶Cu/ZnS Quantum Dots

更新时间：2020-08-12

- Synthesis and Photoluminescent Properties of Core/Shell Structure ZnS∶Cu/ZnS Quantum Dots
- Chinese Journal of Luminescence Vol. 33, Issue 7, Pages: 736-741(2012)
- 作者机构：
  
  中国海洋大学材料科学与工程研究院, 山东青岛 266100
- 作者简介：
- 基金信息：
- DOI：10.3788/fgxb20123307.0736
  CLC： O482.31
- Received：10 April 2012，
  
  Revised：11 May 2012，
  
  Published Online：10 July 2012，
  
  Published：10 July 2012
- 稿件说明：
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田昕, 曹立新, 柳伟, 苏革, 董博华. 核壳型ZnS∶Cu/ZnS量子点的制备及发光性质[J]. 发光学报, 2012,33(7): 736-741

TIAN Xin, CAO Li-xin, LIU Wei, SU Ge, DONG Bo-hua. Synthesis and Photoluminescent Properties of Core/Shell Structure ZnS∶Cu/ZnS Quantum Dots[J]. Chinese Journal of Luminescence, 2012,33(7): 736-741
田昕, 曹立新, 柳伟, 苏革, 董博华. 核壳型ZnS∶Cu/ZnS量子点的制备及发光性质[J]. 发光学报, 2012,33(7): 736-741 DOI： 10.3788/fgxb20123307.0736.

TIAN Xin, CAO Li-xin, LIU Wei, SU Ge, DONG Bo-hua. Synthesis and Photoluminescent Properties of Core/Shell Structure ZnS∶Cu/ZnS Quantum Dots[J]. Chinese Journal of Luminescence, 2012,33(7): 736-741 DOI： 10.3788/fgxb20123307.0736.

摘要

本文采用水相合成方法制备了ZnS∶Cu量子点并进行了ZnS壳层修饰

研究了壳层厚度对ZnS∶Cu量子点光学性质的影响

采用TEM、XRD、PL、PLE和UV-Vis等测试方法对其进行了表征。实验结果表明

合成的ZnS∶Cu/ZnS量子点为立方闪锌矿

尺寸分布均匀呈球形

分散性良好

经过壳层修饰平均粒径由2 nm增加到3.2 nm。随着ZnS壳与ZnS核量的比的增加

量子点的PLE激发峰位置和UV-Vis吸收谱线出现红移

也说明了量子点的尺寸增大

证明ZnS在ZnS∶Cu量子点的表面生长

形成了核壳结构的ZnS∶Cu/ZnS量子点。随着壳层增厚

量子点与铜离子发光中心相关的发射峰强度先增大后减小

当壳核比

=2.5时

发光强度达到最大。

Abstract

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

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

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

increased at the beginning and decreased with further growth of the ZnS shell. The intensity of emission peak achieved the maximum when

=2.5.

关键词

Keywords

references

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