中文摘要：

采用高温固相法合成一系列不同摩尔分数Mn2＋掺杂的Ca9 Sr（PO4）6Cl2荧光粉,并利用X射线粉末衍射及荧光光谱手段对所制备样品的结构及其发光特性进行表征,在波长为412 nm蓝光激发下,Ca9Sr（PO4）6Cl2∶Mn2＋荧光粉产生中心波长位于643 nm的红光宽带发射,其色坐标为（0.68,0.32）.研究发现,Mn2＋掺杂摩尔分数为15％时获得的Ca9Sr （PO4）6Cl2∶Mn2＋荧光粉表现出最佳发光特性.利用Van Uitert理论模型分析发光强度与掺杂浓度之间的关系,表明Ca9 Sr（PO4）6Cl2∶Mn2＋荧光粉中Mn2＋浓度猝灭的机制为电偶极-电偶极相互作用.新型Ca9 Sr（PO4）6Cl2∶Mn2＋荧光粉可望发展成一种具有良好应用前景的白光LED用红色荧光粉材料.

英文摘要：

A series of Ca9 Sr（PO4 ） 6 Cl2＋Mn2＋ phosphors with different concentrations of Mn2＋were prepared via high-temperature solid-state reaction. The structure and photoluminescence of the final products were characterized by X-ray diffraction and fluorescence spectrometry. Upon blue light excitation at 412 nm, the CagSr（PO4）6Cl2 ： Mn2＋ phosphors exhibited a broad band of red emission centered at 643 nm with color coordinates of （0.68,0.32）. The optimal doping mo- lar fraction of Mnz＋ in CagSr（PO4）6Clz ：Mnz＋ phosphors was confirmed to be around 15 %. The concentration-dependent luminescent intensity was analyzed via the Van Uitert model, through which,the mechanism of Mnz＋ concentration quenching was verified to be electric dipole-electric dipole interaction. Research suggested that Ca0 Sr（PO4）6 Clz ：Mnz＋ would be developed as a prom- ising red phosphor for the fabrication of white LED.