Temperature dependence of photoluminescence and magnetic properties in Yb3+-doped ZnS nanocrystals

被引：5

作者：

Ye, Xiaoliang ^{[1
]}

Mao, Huibing ^{[1
]}

Hou, Shili ^{[1
]}

Wang, Jiqing ^{[1
]}

机构：

[1] E China Normal Univ, Dept Elect Engn, Shanghai 200241, Peoples R China

来源：

PHYSICA B-CONDENSED MATTER | 2011年 / 406卷 / 17期

关键词：

ZnS; XRD; Nanocrystals; Photoluminescence; OPTICAL-PROPERTIES; FLUORESCENCE; IONS; LUMINESCENCE;

D O I：

10.1016/j.physb.2011.05.050

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Zinc sulfide semiconductor nanocrystals doped with Yb3+ ions have been prepared through a chemical precipitation method using PVP (polyvinylpyrrolidone) as a capping agent. The structure of the nanoparticles has been analyzed by X-ray diffraction (XRD). The average size of the nanoparticles is found to be 3.7 +/- 0.4 nm. Photoluminescence spectra were recorded for doped ZnS nanoparticles as a function of temperature between 9 and 300 K. The results suggest that two emission bands have been observed at different temperatures. The width of 1.269 eV peak increases as temperature is raised. A shift of lower energy emission band has been observed with the change of temperature. Moreover, the magnetic measurement showed that the sample exhibits paramagnetic behavior. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：3318 / 3321

页数：4

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