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Indian Journal of Pure & Applied Physics (IJPAP) >
IJPAP Vol.46 [2008] >
IJPAP Vol.46(09) [September 2008] >
| Title: | Luminescence studies of MgSO₄:Dy phosphors |
| Authors: | Kher, R S
Upadhyay, A K
Dhoble, S J
Khokhar, M S K |
| Keywords: | Lyoluminescence
Thermoluminescence
Photoluminescence
Magnesium sulphate |
| Issue Date: | Sep-2008 |
| Publisher: | CSIR |
| Abstract: | The lyoluminescence (LL) in MgSO₄:Dy phosphors has been studied. Thermoluminescence (TL) and photoluminescence (PL) have also been studied to understand the mechanism of LL. MgSO₄ phosphors containing different concentrations of Dy (0.05-1.0 mole%) have been prepared by solid-state diffusion method. The maximum LL intensity is observed for 0.05 mole% of Dy in MgSO₄. TL glow curves of MgSO₄:Dy phosphors are complex and peaks around 110, 150 and 220ºC are observed. The effect of post-irradiation annealing on the LL shows that with removal of 220ºC TL peak, the LL intensity decreases markedly. LL and TL intensity of MgSO₄:Dy phosphors have also been recorded for different
g-doses. PL studies conducted on the sample show that Dy³⁺ ion acts as the luminescence center in MgSO₄ phosphor. |
| Page(s): | 607-610 |
| ISSN: | 0379-5136 |
| Source: | IJPAP Vol.46(09) [September 2008]
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