Co-Precipitation Synthesis and Spectral Characteristics of Long Afterglow Phosphor Y2O2S:Sm3+, Mg2+, Ti4+
来源期刊：JOURNAL OF RARE EARTHS2007年第1期
论文作者：Xu Xiaoling Liu Chong Li Panlai Yang Zhiping Li Xu Yang Yong Li Xingmin
Key words：Y2O2S:Sm3+,Mg2+,Ti4+; co-precipitation; emission spectra; excitation spectra; rare earths;
Abstract: 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.
Xu Xiaoling1，Liu Chong2，Li Panlai1，Yang Zhiping1，Li Xu1，Yang Yong1，Li Xingmin3
(1.College of Physics Science and Technology, Hebei University, Baoding 071002, China;
2.College of Graduate, Hebei University, Baoding 071002, China;
3.Handan Municipal Information Industry Bureau, Handan 056002, China)
Abstract: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.
Key words:Y2O2S:Sm3+,Mg2+,Ti4+; co-precipitation; emission spectra; excitation spectra; rare earths;
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