通过高温固相法合成了一系列Ba3La1-x(PO4)3∶xDy3+荧光粉材料。利用XRD测量样品的物相, 结果显示样品为纯相Ba3La(PO4)3晶体。样品的激发光谱由一系列宽谱组成, 峰值分别位于322, 347, 360, 386, 424, 451 nm。在347 nm激发下, 荧光粉在482 nm(4F9/2→6H15/2)和575 nm(4F9/2→6H13/2)处有很强的发射。研究了不同Dy3+掺杂浓度对样品发射光谱的影响, 当Dy3+摩尔分数x=0.10时出现猝灭现象, 浓度猝灭机理为电偶极-电偶极相互作用。确定了不同Dy3+掺杂浓度的Ba3La(PO4)3∶Dy3+的荧光寿命。Ba3La(PO4)3∶Dy3+荧光粉发射光谱的色坐标位于白光区域。

A series of Ba3La1-x(PO4)3∶xDy3+ phosphors were synthesized by a solid-state reaction method. The phase of the as-prepared samples were measured by X-ray diffraction pattern (XRD), and the results showed that the samples were pure phase. The exciation spectrum includes a series of wide bands and the peaks which locate at 322, 347, 360, 386, 424, 451 nm. The phosphor exhibits intense emission at 482 nm(4F9/2→6H15/2) and 575 nm(4F9/2→6H13/2) under 347 nm exciation. The effect of the doping concentration of Dy3+ was investigated, the concentration quenching occurred when x=0.10 and the mechanism of concentration quenching was dipole-dipole interaction. The decay lifetime of different Dy3+-doped concentrations of Ba3La(PO4)3∶Dy3+ phosphors was confirmed. The chromaticity coordinates of Ba3La(PO4)3∶Dy3+ phosphors were measured, which were in the white region.