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Photoluminescence and thermoluminescence studies of CaAl 2 O 4 :Dy 3+ phosphor
Author(s) -
Ziyauddin Mohammad,
Tigga Shalinta,
Brahme Nameeta,
Bisen D. P.
Publication year - 2016
Publication title -
luminescence
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.428
H-Index - 45
eISSN - 1522-7243
pISSN - 1522-7235
DOI - 10.1002/bio.2926
Subject(s) - thermoluminescence , phosphor , photoluminescence , analytical chemistry (journal) , materials science , doping , aluminate , mineralogy , luminescence , nuclear chemistry , chemistry , metallurgy , optoelectronics , cement , chromatography
Calcium aluminate phosphors activated by Dy 3+ have been prepared by a combustion method at a temperature of 600°C. Photoluminescence (PL) and thermoluminescence (TL) properties of gamma‐irradiated Dy‐doped calcium aluminate were investigated. The PL spectrum shows a broad peak around 488 nm and 573 nm, under 347 nm excitation. Thermoluminescence studies were performed for different concentrations of Dy. Optimum intensity of photoluminescence was found for 0.02 mol% concentration of Dy. It was found that initially the peak TL intensity increases with increasing concentration of Dy in the CaAl 2 O 4 host, attains a maximum value for 0.05 mol% concentration and decreases with further increase in the doping concentration due to concentration quenching. Copyright © 2015 John Wiley & Sons, Ltd.