Abstract
Sm2+ ions doped in Ba3BP3O12 polycrystalline samples were obtained by heating the materials in a reducing atmosphere and X-ray irradiation reduction method. The phase formations of the samples were investigated by X-ray powder diffraction measurements. The temperature-dependent emission spectra and luminescence decay curves of Sm2+ ions reduced by the two methods were investigated at various temperatures (10–300 K). The crystallographic site distributions and the thermal quenching of 5D0→7F0 luminescence transition of Sm2+ ions in the two samples have different characteristics. The photostabilities of the Sm2+ ions were evaluated with the photobleaching method by monitoring the 5D0→7F0 luminescence transition under the excitation of 488 nm of Ar+ laser. The luminescence and reduction mechanism of Sm3+→Sm2+ were discussed. The luminescence properties and stabilities of the Sm2+ ions are highly dependent on the sample preparation conditions.
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