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2009 , Vol. 24 >Issue 2: 247 - 250

DOI: https://doi.org/10.3724/SP.J.1077.2009.00247

研究论文

复合结构纳米晶CdS∶Cu/CdS的制备及光学特性

  • 蔡 柯 ,
  • 王洪哲 ,
  • 申怀彬 ,
  • 陶小军 ,
  • 李林松 ,
  • 杜祖亮
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  • 河南大学 特种功能材料教育部重点实验室, 开封 475004

收稿日期: 2008-05-15

  修回日期: 2008-06-25

  网络出版日期: 2009-03-20

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Preparation and Optical Properties of CdS∶Cu/CdS Nanocrystals

  • CAI Ke ,
  • WANG Hong-Zhe ,
  • SHEN Huai-Bin ,
  • TAO Xiao-Jun ,
  • LI Lin-Song ,
  • DU Zu-Liang
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  • Key Lab for Special Functional Materials of Ministry of Education, Henan University, Kaifeng 475001, China

Received date: 2008-05-15

  Revised date: 2008-06-25

  Online published: 2009-03-20

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摘要

在非配位溶剂中合成了高质量的CdS纳米晶核,并利用Cu2+离子对其进行掺杂,制备了CdS∶Cu纳米晶.通过进一步采用连续离子层吸附反应的方法对CdS∶Cu纳米晶进行表面修饰,得到CdS∶Cu/CdS复合结构纳米晶.利用X射线衍射(XRD),透射电镜(TEM),紫外可见吸收光谱(UV-Vis)和荧光光谱(PL)对其结构、形貌以及光学性质进行了表征和分析,结果表明:所制备的复合结构CdS∶Cu/CdS纳米晶为立方闪锌矿结构;与CdS纳米晶核相比,掺杂Cu2+可以使其表面态发光发生红移;在CdS∶Cu纳米晶中,通过改变掺杂Cu2+的浓度,可以实现表面态发光在570和620nm之间的连续调节.与未经包覆的CdS∶Cu纳米晶相比,包覆层CdS增强了纳米晶CdS∶Cu的稳定性.

关键词： CdS∶Cu/CdS; 纳米晶; 掺杂

本文引用格式

蔡 柯 , 王洪哲 , 申怀彬 , 陶小军 , 李林松 , 杜祖亮 . 复合结构纳米晶CdS∶Cu/CdS的制备及光学特性[J]. 无机材料学报, 2009 , 24(2) : 247 -250 . DOI: 10.3724/SP.J.1077.2009.00247

Abstract

CdS cores were successfully synthesized in noncoordinating solvents. The composite structure of core/shell CdS∶Cu/CdS nanocrystals was obtained through the modification of as-prepared Cu2+ ions doped CdS cores using successive ion layer adsorption and reaction (SILAR) technique. The crystal structures, shapes and optical properties of as-synthesized nanocrystals were characterized by X-ray diffraction, transmission electron microscope, UV-Vis absorption and photoluminescence spectroscope. The results show that the crystal structure of asprepared CdS∶Cu/CdS nanocrystal is zinc blende. Compared with pure CdS nanocrystals, the Cu2+ dopant in CdS leads the surfacestate related emission peak shifting to longer wavelength. The surfacestate related emission of CdS∶Cu nanocrystal can also be adjusted consecutively from 570nm to 620nm by tuning the doping concentration of Cu2+ ions from 2% to 6%. The overcoating of CdS shell can increase the stability of surfacestate related emission of CdS∶Cu nanocrystals.

Key words： CdS∶Cu/CdS; nanocrystals; doping

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