Synthesis, structural, and optical properties of core/shell ZnS:Fe/ZnS nanocrystals

被引：12
|
作者：
Liu, Lingyun [1 ]
Xie, Ruishi [1 ]
Yang, Lin [1 ]
Xiao, Dingquan [1 ]
Zhu, Jianguo [1 ]
机构：
[1] Sichuan Univ, Coll Mat Sci & Engn, Chengdu 610064, Peoples R China
来源：
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE | 2011年 / 208卷 / 04期
基金：
中国国家自然科学基金;
关键词：
core/shell nanocrystals; II-VI semiconductors; optical properties; ZnS:Fe/ZnS; ZNS-MN NANOPARTICLES; LUMINESCENCE ENHANCEMENT; CU;
D O I：
10.1002/pssa.201026698
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
ZnS:Fe/ZnS core/shell nanocrystals (NCs) were synthesized by a simple liquid-solid-solution (LSS) method and the influence of ZnS shell thickness on the optical properties of ZnS:Fe/ZnS NCs was investigated. The crystalline and optical properties of ZnS:Fe/ZnS core/shell NCs were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), photoluminescence (PL) spectroscopy, UV-Visible spectrometer and FT-IR spectrometer, respectively. It was found that the ZnS:Fe/ZnS core/shell NCs are highly crystalline and show zincblende structure with an average particle size of about 7 nm. The lattice constants of the ZnS:Fe/ZnS NCs decrease slightly by the introduction of Fe, and the Fe dopants were well doped into the ZnS:Fe/ZnS NCs, as confirmed by XPS. Compared to the pure ZnS:Fe NCs, the ZnS:Fe/ZnS core/shell NCs exhibited significantly enhanced luminescence properties. A red-shift can be observed in the absorption and PL spectra as the ZnS shells thickened. (C) 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
引用
收藏
页码：863 / 867
页数：5
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