Optical properties of Sr₂SiO₄:Eu²⁺, Dy³⁺ phosphors prepared by combustion method

In the present paper, TL and PL study of Dy³⁺ doped Sr₂SiO₄:Eu²⁺ phosphor is reported. A polycrystalline sample of Sr₂SiO₄:Eu²⁺, Dy³⁺ was prepared by combustion method. The obtained phosphor was characterized by powder X-ray diffraction, scanning electron microscopy, UV-Vis spectroscopy, PL and thermoluminescence. The results of the XRD studies obtained for Sr₂SiO₄:Eu²⁺, Dy³⁺ phosphor revealed its monoclinic structure. The average crystallite size was calculated as 12.77 nm. Thermoluminescence study was carried out for the phosphor using UV irradiation and a single glow peak was found. The thermoluminescence glow curves of the samples were measured at various concentrations of co-dopant. The kinetic parameter has been calculated using Chen’s glow curve method. In this paper, the photoluminescence and afterglow behavior of these phosphors are reported.