用高温固相反应法合成了M2EuxLn1-xAlO5(M=Ca，Sr，Ba，Ln=La，Lu，Gd)荧光粉，研究了荧光粉的发光性质。在紫外光和近紫外光激发下，样品的发射光谱由Eu3+的5D0→7FJ (J=0，1，2，3，4) 特征发射组成。其中Eu3+离子位于590 nm附近的5D0→7F1和位于620 nm附近的5D0→7F2跃迁发射的强度最强。荧光粉的激发光谱都是由O2--Eu3+电荷迁移带和Eu3+的f-f 跃迁构成的。M2EuxLa1-xAlO5(M=Ca，Sr，Ba)的O2--Eu3+的电荷迁移带的峰位按Ca、Sr、Ba顺序向长波方向移动。研究了用La、Gd和Lu替代Sr2EuxLn1-xAlO5中Ln的位置对样品发光的影响。给出了Eu3+浓度对发光强度的影响。分析了Sr2EuxLa1-xAlO5和Sr2EuxGd1-x-AlO5的荧光寿命。

The red emitting phosphors M2EuxLn1-xAlO5 (M=Ca, Sr, Ba, Ln=La, Lu, Gd) were synthesized through the solid state reaction technique. The photoluminescence properties were described. Upon excitation with UV and near UV light excitation, the photoluminescence emission spectra could be assigned to the transitions of Eu3+ from the initial state 5D0 to the final states 7FJ (J=0,1,2,3,4). The two strong emissions peaked at 590 nm and 620 nm, which arose from the 5D0-7F1 and 5D0-7F2 transitions of Eu3+, respectively. The photoluminescence excitation spectra show abroad O2--Eu3+ charge-transfer band and f-f transitions. O2--Eu3+ charge-transfer bands of M2EuxLa1-xAlO5 (M= Ca，Sr，Ba) shift to the longer wavelength in order of Ca, Sr, Ba. The replacement of Ln in Sr2EuxLn1-xAlO5 by La, Gd and Lu was studied. The dependence of the integrated luminescence intensities on Eu3+ concentration was presented. The lifetimes of Sr2EuxLa1-x-AlO5 and Sr2EuxGd1-xAlO5 were analyzed.