A novel Sr3Y(PO4)3-based white light-emitting phosphor |
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Authors: | Jie Zhang Bing Han |
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Institution: | 1. School of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, 450002, P.R. China
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Abstract: | The Sr3Y(PO4)3:0.05Sm3+, Sr3Y(PO4)3:0.005Tb3+, and Sr3Y(PO4)3:0.005Tb3+, 0.05Sm3+ phosphors were synthesized using a conventional solid-state reaction technique at high temperature and their photoluminescence properties under ultraviolet (UV) excitation were studied. We observed the UV sensitization of Sm3+ emission (565, 600, and 648 nm) by Tb3+ in Sr3Y(PO4)3:0.005Tb3+, 0.05Sm3+, that leads to a white light emission with the CIE coordinate (0.367, 0.312) of Sr3Y(PO4)3:0.005Tb3+, 0.05Sm3+ phosphor under UV excitation. The emission is a result of partial energy transfer from Tb3+ to Sm3+, which is discussed in detail in terms of the corresponding excitation and emission spectra. |
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