Photoluminescence and thermoluminescence studies of CaAl2O4:Dy3+ phosphor |
| |
Authors: | Mohammad Ziyauddin Shalinta Tigga Nameeta Brahme D. P. Bisen |
| |
Affiliation: | School of Studies in Physics and Astrophysics, Pt. Ravishankar Shukla University, Raipur, Chhattisgarh, India |
| |
Abstract: | Calcium aluminate phosphors activated by Dy3+ 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 CaAl2O4 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. |
| |
Keywords: | thermoluminescence (TL) photoluminescence (PL) CaAl2O4:Dy3+ combustion synthesis |
|
|