Studies on structural properties, luminescence behavior and zeta potential of Dy3+ doped alkaline earth ortho-silicate phosphors

Highlights: • The single phase (orthorhombic) Sr₂SiO₄:Dy³⁺ phosphor was synthesized. • The phosphors show two emission bands located at 477 nm and 573 nm in the blue and yellow region respectively. • The prepared phosphor is better candidate for white light emitting applications. • Natures of traps are investigated through thermoluminescence studies. • It can be applicable to characterization of materials, archeological, geological dating. Alkaline earth orthosilicate (Sr 2 SiO 4 ) phosphor doped with Dy 3+ was synthesized by a traditional high-temperature solid-state reaction method. XRD analysis confirmed the formation of the phosphor with the orthorhombic crystal structure and their phase purity was checked using theoretical fitting Rietveld refinement. Zeta potential measurements of parent phosphor in different medium were performed to check its stability. The surface morphology and the elemental composition of the phosphors were examined using SEM and EDX, respectively. The optical behavior is determined by PL analysis. CIE coordinates of the phosphors represents the white light emission characteristics of Sr 2 SiO 4: Dy 3+ phosphors. Due to white light emission characteristic, this work will open a new window for its use in W-LED applications. Thermoluminescence (TL) behavior of phosphor was studied and its TL kinetic parameters were estimated based on computerized glow curve deconvolution (CGCD) fitting.