Photoluminescence and thermoluminescence studies of CaAl2O4:Dy(3+) phosphor.
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 CaAl2O4 host, attains a maximum value for 0.05 mol% concentration and decreases with further increase in the doping concentration due to concentration quenching.
School of Studies in Physics and Astrophysics, Pt. Ravishankar Shukla University, Raipur, Chhattisgarh, India.
Mohammad
M
Ziyauddin
School of Studies in Physics and Astrophysics, Pt. Ravishankar Shukla University, Raipur, Chhattisgarh, India.
Shalinta
S
Tigga
School of Studies in Physics and Astrophysics, Pt. Ravishankar Shukla University, Raipur, Chhattisgarh, India.
Nameeta
N
Brahme
School of Studies in Physics and Astrophysics, Pt. Ravishankar Shukla University, Raipur, Chhattisgarh, India.
D P
DP
Bisen
D017607:Aluminum Compounds / Q000737:chemistry*; D017610:Calcium Compounds / Q000737:chemistry*; D004419:Dysprosium / Q000737:chemistry*; D049449:Luminescence; D008163:Luminescent Measurements; D055668:Photochemical Processes; D013819:Thermoluminescent Dosimetry
D017607:Aluminum Compounds; D017610:Calcium Compounds; C035219:calcium aluminate; D004419:Dysprosium
CaAl2O4:Dy3+; combustion synthesis; photoluminescence (PL); thermoluminescence (TL)