Ce3+ to Tb3+ energy transfer in alkaline earth (Ba, Sr or Ca) sulphate phosphors

被引：55
|
作者：
Jose, MT [1 ]
Lakshmanan, AR [1 ]
机构：
[1] Indira Gandhi Ctr Atom Res, Hlth & Safety Div, Kalpakkam 603102, Tamil Nadu, India
来源：
OPTICAL MATERIALS | 2004年 / 24卷 / 04期
关键词：
energy transfer; lamp phosphor; green emission; alkaline earth sulphates; rare earth;
D O I：
10.1016/S0925-3467(03)00180-0
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Energy transfer between Ce3+ and Tb3+ dopants in alkaline earth (Ba, Sr or Ca) sulphate phosphors is investigated. Among these three phosphors, CaSO4:Ce3+ Tb3+ showed maximum Tb3+ green emission on excitation with UV light. Photoluminescence measurements reveal that the emission intensity from CaSO4:Ce3+, Tb3+ is comparable with that of the commercial green lamp phosphor Ce0.65Tb0.35MgAl11O19. Optimum concentrations of dopants in CaSO4:Ce3+, Tb3+ are 0.2 mol% each and the optimum sintering treatment following re-crystallisation is 600 degreesC for I h duration. The effect of charge compensator in all the three phosphors is also studied. (C) 2003 Elsevier B.V. All rights reserved.
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收藏
页码：651 / 659
页数：9
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