Optical Properties of Eu3+doped CaSiO3Phosphors

Abstract

Optical properties of Eu³⁺ doped CaSiO₃ Phosphor were synthesized using the conventional Solid-State Reaction (SSR) technique. The morphology, size, and shape of the synthesized Nano phosphorous powder were investigated using photoluminescence (PL), scanning electron microscopy (SEM), X-ray diffraction (XRD) and CIE colour coordinates (1931-Chart) analysis. XRD profiles of samples sintered over 1200^◦C, suggested phase shift from amorphous powder grain to more ordered polycrystalline powder of triclinic type CaSiO₃ phosphor, with preferred crystal phase orientation of (112) and tetragonal type cristobalites of SiO₂. The grain size, crystallinity, and chemical composition of the host matrix, activator and sensitizer strongly affected both the absorption and emission bands of these samples. The amplitude of both the orange and red emission bands significantly increased with sintering temperature. The emission band is red-shifted with decreasing grain sizes.