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Journal of Inorganic Materials

Journal of Inorganic Materials >

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

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

Research Paper

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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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

Cite this article

CAI Ke , WANG Hong-Zhe , SHEN Huai-Bin , TAO Xiao-Jun , LI Lin-Song , DU Zu-Liang . Preparation and Optical Properties of CdS∶Cu/CdS Nanocrystals[J]. Journal of Inorganic Materials, 2009 , 24(2) : 247 -250 . DOI: 10.3724/SP.J.1077.2009.00247

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