Energy transfer process in CaSO4:Tb,Ce phosphor

被引：35

作者：

Sanaye, SS

Dhabekar, BS

Kumar, R

Menon, SN

Shinde, SS

Rao, TKG

Bhatt, BC ^{[1
]}

机构：

[1] Bhabha Atom Res Ctr, Radiol Phys & Advisory Div, Bombay 400085, Maharashtra, India

[2] Indian Inst Technol, Reg Sophisticated Instrumentat Ctr, Bombay 400076, Maharashtra, India

来源：

JOURNAL OF LUMINESCENCE | 2003年 / 105卷 / 01期

关键词：

thermoluminescence; photoluminescence; electron spin resonance (ESR); energy transfer;

D O I：

10.1016/S0022-2313(03)00091-7

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Thermoluminescence (TL) and photoluminescence studies have been carried out on CaSO4:Tb, CaSO4:Ce, and, CaSO4:Tb,Ce phosphors with,the aim of studying energy transfer process in the CaSO4:Tb,Ce phosphor. (CaSO4Tb)-Tb-.,Ce shows TL peaks at 150, 220, 320 and 400degreesC. Changes in Tb and Ce concentrations influence the relative heights of these glow peaks. Co-doping with 0.1 mol% of Ce in CaSO4:Tb enhances the sensitivity of 320degreesC TL peak by a factor of 15. Fluorescence results show that there is energy transfer from Ce to Tb ion. The defect centres formed in CaSO4:Tb,Ce phosphor are studied using electron spin resonance technique. The 320degreesC glow peak correlates with a centre (SO3- radical) with g-values: g(parallel to) = 2.0061 and g(perpendicular to) = 2.0026. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：1 / 8

页数：8

共 18 条

[11] OPTICAL-ABSORPTION AND LUMINESCENT PROCESSES IN THERMOLUMINESCENT CASO4 DY [J].