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中文摘要：
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。
英文摘要：
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.
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