本文报道了Pr掺杂SrBi2Ta2O9 (SBTO)铋层状铁电材料的光致发光特性.通过适量的Pr掺杂制得的SrBi2Ta2O9陶瓷样品在室温下具有很强的红光和绿光发射.光致发光激发谱显示样品具有蓝光激发特性,该激发带对应Pr3+离子的基态3H4到激发态3pJ (J=0,1,2)的跃迁吸收.在蓝光激发下,样品具有宽带发射,发射峰对应Pr3+离子f-f辐射跃迁中:3P1→3H5 (532 nm),3p0→3H5 (546 nm),1D2→3H4 (600 nm),3p0→3H6 (620 nm),3p0→3F2 (656 nm)和3p0→3F4 (743 nm)跃迁.Pr掺杂SBTO样品蓝光激发的光致发光特性将可能使其在白光LED及其相关器件中得到应用.
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