Synthesis of Sm³⁺ Doped Sr₂CeO₄ Blue Phosphor and Its Characterization

The Samarium doped Sr₂CeO₄ color tunable phosphors were successfully synthesized by solid state reaction method at temperature 1200° C for 4h. The present paper reports spectroscopic study of blue emitting Sr₂CeO₄ phosphor and Sr₂CeO₄ phosphor doped with the rare earth element Samarium. The powder samples were characterized by FTIR, XRD EDAX and PL. The X-Ray diffraction pattern reveals the crystallite size. The photoluminescence study of Sr₂CeO₄ reveals the emission in the blue region. The emission color can be changed by tuning activator's concentration in Sr₂CeO₄:Sm³⁺ phosphors. The doped compound emits strong red light when the concentration of the doped Sm³⁺ is 1.5%. The emission color can be changed by tuning activator's concentration in Sr₂CeO₄:Sm³⁺ phosphors. The effects of doping Sm³⁺ on the formation and luminescence properties were investigated.