In this work, the modulation of photoluminescence (PL) properties, which was realized by the composition and poling-induced structural evolution, for the Pr³⁺ doped (1-x)(Na_1/2Bi_1/2)TiO₃-xBaTiO₃ (NBT-xBT: Pr³⁺) piezoelectric ceramics was systematically investigated. Based on the Rietveld refinement structural analysis, there were two distinct composition ranges characterized by different structural features for NBT-xBT: Pr³⁺ ceramics at room temperature: (i) rhombohedral R3c + monoclinic Cc phases for the compositions of x ≤ 0.03, and (ii) tetragonal P4bm + monoclinic Cc phases for 0.04 ≤ x ≤ 0.07. It was interesting to notice that the PL emission intensity is positively correlated with the phase fraction of Cc, which is closely related to the crystal symmetry of NBT-xBT: Pr³⁺ ceramics. The compositions with x ≤ 0.06 underwent an irreversible phase transformation on the application of electric field. The dielectric and Raman measurement revealed a transition from a relaxor state to a normal ferroelectric for the x ≤ 0.06 compositions under an applied poling electric field, with not only the reduction in the in-phase octahedral tilting disorder but also the establishment of long-range ordering. These electric field-induced structural changes were responsible for poling-induced PL quenching behaviors as a result of the increased local structure symmetry around doped Pr³⁺ ions in the poled ceramics.

在这项工作中，通过掺杂和掺杂Pr ³⁺（1- x）（Na _1/2 Bi _1/2）TiO _3-来调制光致发光（PL）特性，这是通过成分和极化诱导的结构演化实现的。系统地研究了x BaTiO ₃（NBT- x BT：Pr ³⁺）压电陶瓷。根据Rietveld细化结构分析，NBT- x BT有两个不同的组成范围，这些结构范围具有不同的结构特征：室温下的Pr ³⁺陶瓷：（i）菱面体R 3 c  +单斜晶Cc相对于组合物的X  ≤0.03，和（ii）四方P 4 BM  +单斜抄送为0.04≤相位 X  ≤0.07。有趣的是，PL发射强度与Cc的相位分数呈正相关，这与NBT- x BT：Pr ³⁺陶瓷的晶体对称性密切相关。用该组合物X  ≤0.06上电场的应用进行的不可逆相变。介电和拉曼测量揭示了x的从弛豫态到正常铁电的跃迁 在施加的极化电场下≤0.06成分，不仅减少了同相八面体倾斜紊乱，而且建立了长程有序。这些电场引起的结构变化是极化陶瓷中掺杂的Pr ³⁺离子周围局部结构对称性增加的结果，是极化诱导的PL猝灭行为的原因。