Structural and optical properties of Dy³⁺ doped Sr₂SiO₄ phosphors

Dysprosium doped strontium silicate phosphor namely (Sr₂SiO₄:Dy³⁺) was prepared by low-temperature solution combustion method using urea (CO(NH₂)₂) as a fuel. The material was characterized by powder X-ray diffraction (XRD), FT-IR, SEM and EDX. The average crystallite sizes was calculated by Scherer formula. Thermoluminescence study was carried out for the phosphor which showed single glow curve. The kinetic parameter were calculated by using Chen’s glow curve method. Photoluminescence spectra revealed strong transition at 473 nm (blue), 571 nm (yellow) and weak transition at 645 nm (red). These peaks were assigned to transition ⁴F_9/2 →⁶H_15/2, _{13/2, 11/2}. CIE graph of Sr₂SiO₄:Dy³⁺ phosphor is suitable for the generation of white light emission.