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Energy transfer process in CaSO4 : Tb,Ce phosphor

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Title Energy transfer process in CaSO4 : Tb,Ce phosphor
 
Creator SANAYE, SS
DHABEKAR, BS
KUMAR, R
MENON, SN
SHINDE, SS
RAO, TKG
BHATT, BC
 
Subject thermostimulated luminescence
caso4 phosphors
photoluminescence
thermoluminescence
photoluminescence
electron spin resonance (esr)
energy transfer
 
Description 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
 
Publisher ELSEVIER SCIENCE BV
 
Date 2011-07-24T23:39:09Z
2011-12-26T12:48:39Z
2011-12-27T05:49:30Z
2011-07-24T23:39:09Z
2011-12-26T12:48:39Z
2011-12-27T05:49:30Z
2003
 
Type Article
 
Identifier JOURNAL OF LUMINESCENCE, 105(1), 1-8
0022-2313
http://dx.doi.org/10.1016/S0022-2313(03)00091-7
http://dspace.library.iitb.ac.in/xmlui/handle/10054/6570
http://hdl.handle.net/10054/6570
 
Language en