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A new kind of host phosphor materials Ba3 La2 (BO3)4 doped with Sm3+ ion, were prepared by solid state reaction method. The crystal structure of synthesized samples is an orthorhombic structure confirmed by XRD study. The FTIR spectra confirmed the band assignments among the borate networks. The thermal stability of the sample was examined by TG-DTA study. FESEM and EDX provide surface morphology and elemental composition of the materials. From DRS analysis we have calculated the energy band gap through Tauc plot method. For PL studies, Ba3 La2 (BO3)4: Sm3+ samples excitation spectra were monitored at 601 nm and the prominent excitation peak was observed at 408 nm. The emission spectra consist of four bands and the highest intense emission peak was observed at 601 nm (4 G 5/2 → 6 H 7/2) due to the intra 4f transition of the Sm3+ ion. From CIE 1931 Chromaticity, the color coordinates were calculated x = 0.5363; y = 0.4519 and these are lying in the orange-red region. Hence this new phosphor sample might be a useful material for an orange-red emission, applicable in solid-state lighting and display devices. |
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