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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