【摘 要】
：
Y2O2S:Sm3+, Mg2+, Ti4+ phosphor was synthesized by co-precipitation method. The crystalline structure of all synthesized phosphors was investigated by XRD. The
【机 构】
：
College of Physics Science and Technology,Handan Municipal Information Industry Bureau,College of Gr
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Y2O2S:Sm3+, Mg2+, Ti4+ phosphor was synthesized by co-precipitation method. The crystalline structure of all synthesized phosphors was investigated by XRD. The result showed that all synthesized phosphors had a hexagonal crystal structure, which was the same as Y2O2S. The emission spectrum and excitation spectrum were measured, and the effect of Sm3+ molar ratio on the spectra was discussed. The emission spectra of the phosphors showed three emission peaks due to typical transitions of Sm3+(4G5/2→6HJ, J=5/2, 7/2, 9/2), and the emission peaks at 606 nm was stronger than others. With the increase of Sm3+ molar ratio, the emission intensity was strengthened. The excitation peaks were ascribed to the representative energy transition 4f→4f of Sm3+ ions. The results indicated that the Y2O2S:Sm3+,Mg2+, Ti4+ phosphor prepared by co-precipitation method was an efficient long afterglow phosphor.
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