The Y,0.98,Sm,0.02,TaO,4, long lasting phosphorescence(LLP) material was synthesized by high temperature solid state reaction, and the co-doping experiment of replacing Ta,5+, with Nb,5+, was also carried out. The results of X-ray powder diffraction spectra shown that the doped ions did not change the crystal structure of YTaO,4,. Through room temperature steady-state photoluminescence(PL) and long-lasting phosphorescence experiments, it is found that the addition of Nb,5+, can greatly increase the intensity of long-lasting phosphorescence of Sm,3+, in YTaO,4, and change the emission color of PL and LLP. In this paper, the properties and mechanism of PL and LLP of YTaO,4,:Sm,3+, Nb,5+, are studied, respectively.
transition metal composite oxidelong-lasting phosphorescenceNb5+Ta5+color tunable
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