The trivalent terbium doped Sr2CeO4 phosphors were successfully synthesized by solid state reaction and their luminescent characteristics were studied. The powders were fired at 12000 C for four hour at the rate of 3000 C/hr. The present paper reports the XRD and spectroscopic study of blue emitting Sr2CeO4 phosphor doped with the rare earth element Terbium. The X-Ray diffraction pattern reveals the crystallite size of particle. The average crystallite size of the Sr2CeO4 phosphor is 22 nm. And when Tb doped with Sr2CeO4 phosphor the crystallite size is 35 nm. The photoluminescence study of these materials reveals the emission in the blue region. The emission color can be changed by tuning activator’s concentration in Sr2CeO4 phosphors. Photoluminescence of Sr2CeO4: Tb was observed when the excitation of the samples was kept at 262nm, the emission peaks are decreases as concentration of terbium increases. The formations of thermoluminescence traps are less which leads to non availability of TL centers.
