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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
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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