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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/6570

Title: Energy transfer process in CaSO4 : Tb,Ce phosphor
Authors: SANAYE, SS
DHABEKAR, BS
KUMAR, R
MENON, SN
SHINDE, SS
RAO, TKG
BHATT, BC
Keywords: thermostimulated luminescence
caso4 phosphors
photoluminescence
Issue Date: 2003
Publisher: ELSEVIER SCIENCE BV
Citation: JOURNAL OF LUMINESCENCE, 105(1), 1-8
Abstract: 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
URI: 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
ISSN: 0022-2313
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