Persistent luminescence in rare earth ion-doped gadolinium oxysulfide phosphors

被引：54

作者：

Lei, Bingfu ^{[1
,2
]}

Liu, Yingliang ^{[1
]}

Zhang, Junwen ^{[1
]}

Meng, Jianxin ^{[1
]}

Man, Shiqing ^{[1
]}

Tan, Shaozao ^{[1
]}

机构：

[1] Jinan Univ, Dept Chem, Guangzhou 510632, Guangdong, Peoples R China

[2] Jinan Univ, Dept Phys, Guangzhou 510632, Guangdong, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2010年 / 495卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Rare earth ions; Gadolinium oxysulfide; Long afterglow; LONG-LASTING PHOSPHORESCENCE; AFTERGLOW PROPERTIES; UP-CONVERSION; CA; PHOTOLUMINESCENCE; Y2O2S-TI; DY3+; MG2+; EU2+; TIME;

D O I：

10.1016/j.jallcom.2010.01.141

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A series of rare-earth ion-doped gadolinium oxysulfide phosphors Gd2O2S:RE3+, Ti, Mg (RE = Ce, Pr, Nd, Sm, Eu,Tb, Dy, Ho, Er, Tm, Yb) were synthesized by solid-state reaction. The excitation and photoluminescence spectra, afterglow spectra, afterglow decay curves and thermoluminescence spectra of the phosphors were examined. According to the afterglow spectra, gadolinium oxysulfide doped with rare-earth ions were classified into three groups. When rare earth ions such as Eu3+, Sm3+, Dy3+, Ho3+, Er3+ and Tm3+ were introduced into the Gd2O2S host, their characteristic emission as well as that from Gd2O2S:Ti, Mg were observed. In case of Yb3+ and Nd3+, only the broadband luminescence of Gd2O2S:Ti, Mg was obtained. Gadolinium oxysulfide doped with Pr3+, Tb3+ and Ce3+ did not show afterglow emission. The calculated trap energy levels of the samples were compared. The role of Ti and Mg ions and a potential mechanism for persistent luminescence in the samples were discussed. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：247 / 253

页数：7

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