红色长余辉材料Y_2O_2S:Eu,Si,M(M=Mg,Ca,Sr,Ba)的制备及发光性能

Synthesis and Characterization of New Long Lasting Red Phosphors Y_2O_2S:Eu,Si,M(M=Mg,Ca,Sr,Ba)

采用高温固相法合成了红色长余辉材料Y2O2S:Eu,Si,M(M=Mg,Ca,Sr,Ba),利用X晶体衍射、发光光谱、热释光测量等对材料的性能进行了表征。结果分析表明:Y2O2S:Eu,Si,M(M=Mg,Ca,Sr,Ba)长余辉材料的最大荧光发射和余辉发射峰完全一致都位于627nm,产生红光发射,是典型的Eu3+离子的5D0-7F2跃迁。激发停止后,能够产生较好的余辉性能。碱土金属离子能够增强其荧光发射峰强度并对余辉性能有一定促进作用,其中以Mg2+最好,其次是Ba2+。

Y2O2S：Eu,Si,M（M=Mg,Ca,Sr,Ba） long lasting red luminescence phosphors were synthesized by solid state reaction and analyzed by means of XRD, photoluminescence （ PL）, thermo luminescence, etc. The results indicate that the strongest emission of both emission spectrum and afterglow spectrum peaks at around 627.0 nm, which is assigned to electric dipole 5D0→7F2 transition of Eu3＋, which behaves excellent afterglow property. The doping of alkaline earth ions improves the PL intensity and the afterglow property of the Y2O2S：Eu,Si,M（M=Mg,Ca,Sr,Ba） phosphors. Of all, the Mg-doped sample shows the best property, the next one is the Ba-doped material.