采用高温固相法制备了上转换白光荧光粉AlF3-YbF3:Er3 +/Tm3+.通过XRD物相分析可知:上转换白光荧光粉AlF3 -YbF3:Er3+/Tm3+是由三方AlF3相和正交YbF3相组成；利用发射光谱研究了该荧光粉的上转换发光性能,并且分析了当固定Er3+离子掺杂浓度时,Tm3+离子掺杂浓度对上转换白光荧光粉AlF3-YbF3:Er3+/Tm3+色度的影响,进而提出其上转换能量传递机制.结果表明:在980 nm激光激发下,波长为410 nm的紫光峰、550 nm的绿光峰和660 nm的红光峰分别对应于荧光粉中Er3+离子的2H9/2 →4I15/2,4S3/2→4I15/2和4F9/2→4I15/2能级的跃迁,而波长为360 nm的紫外光峰、450 nm的蓝光峰、700 nm的红光峰,分别对应于荧光粉中Tm3离子的1D2→3H6,1G4→3H6和1G4 →3F4能级的跃迁,Er3+离子发出的光与Tm3+离子发出的光最终混合成色坐标为x =0.32,y=0.36的白光.此外,通过980 nm半导体激光器和EPM 2000 Dual-channel Joulemeter/Power meter测得该荧光粉最大上转换效率为6.90％.
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