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题名: Concentration effect of Mn2+ on the photoluminescence of ZnS : Mn nanocrystals
作者: Peng WQ;  Qu SC;  Cong GW;  Wang ZG
发表日期: 2005
摘要: Mn-doped ZnS nanocrystals of about 3 nm diameter were synthesized by a wet chemical method. X-ray diffraction (XRD) measurements showed that the nanocrystals have the structure of cubic zinc blende. The broadening of the XRD lines is indicative of nanomaterials. Room temperature photoluminescence (PL) spectrum of the undoped sample only exhibited a defected-related blue emission band. But for the doped samples, an orange emission from the Mn2+ T-4(1)-(6)A(1) transition was also observed, apart from the blue emission. The peak position (600 nm) of the Mn2+ emission was shifted to longer wavelength compared to that (584 nm) of bulk ZnS:Mn. With the increase of the Mn2+ concentration, the PL of ZnS:Mn was significantly enhanced. The concentration quenching effect was not observed in our experiments. Such PL phenomena were attributed to the absence of Mn2+ pairs in a single ZnS:Mn nanocrystal, considering the nonradiative energy transfer between Mn2+ ions based on the Poisson approximation. (c) 2005 Elsevier B.V. All rights reserved.
KOS主题词: doping
刊名: JOURNAL OF CRYSTAL GROWTH
专题: 中国科学院半导体研究所(2009年前)_期刊论文

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推荐引用方式:
Peng, WQ; Qu, SC; Cong, GW; Wang, ZG .Concentration effect of Mn2+ on the photoluminescence of ZnS : Mn nanocrystals ,JOURNAL OF CRYSTAL GROWTH,JUN 1 2005,279 (3-4):454-460
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