Synthesis and photoluminescence of ZnS:Cu nanoparticles

被引：361

作者：

Peng, W. Q. ^{[1
]}

Cong, G. W. ^{[1
]}

Qu, S. C. ^{[1
]}

Wang, Z. G. ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Semicond, Key Lab Semicond Mat Sci, Beijing 100083, Peoples R China

来源：

OPTICAL MATERIALS | 2006年 / 29卷 / 2-3期

基金：

国家高技术研究发展计划(863计划); 中国国家自然科学基金;

关键词：

zinc sulfide; nanoparticles; photoluminescence;

D O I：

10.1016/j.optmat.2005.10.003

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The room-temperature photoluminescence (PL) of copper doped zinc sulfide (ZnS:Cu) nanoparticles were investigated. These ZnS:Cu nanoparticles were synthesized by a facile wet chemical method, with the copper concentration varying from 0 to 2 mol%. By Gaussian fitting, the PL spectrum of the undoped ZnS nanoparticles was deconvoluted into two blue luminescence peaks (centered at 411 nm and 455 nm, respectively), which both can be attributed to the recombination of the defect sates of ZnS. But for the doped samples, a third peak at about 500 nm was also identified. This green luminescence originates from the recombination between the shallow donor level (sulfur vacancy) and the t(2) level of Cu2+. With the increase of the CU2+ concentration, the green emission peak is systematically shifted to longer wavelength. In addition, it was found that the overall photoluminescence intensity is decreased at the Cu2+ concentration of 2%. The concentration quenching of the luminescence may be caused by the formation of CuS compound. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：313 / 317

页数：5

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