Sm^(3+)掺杂双钙钛矿结构Sr_(3)Sn_(2)O_(7)的应力发光特性  

Mechanoluminescent Properties of Sm^(3+)Doped Double Perovskite Sr_(3)Sn_(2)O_(7)

作　　者：王强科 梁玉军 涂东 WANG Qiangke;LIANG Yujun;TU Dong(School of Physics and Technology,Wuhan University,Wuhan 430064,China;Faculty of Materials Science and Chemistry,China University of Geosciences,Wuhan 430070,China;Suzhou Research Institute of Wuhan University,Suzhou 215125,Jiangsu,China)

机构地区：[1]武汉大学物理科学与技术学院,武汉430064 [2]中国地质大学(武汉)材料与化学学院,武汉430070 [3]武汉大学苏州研究院,江苏苏州215125

出　　处：《硅酸盐学报》2022年第12期3141-3146,共6页Journal of The Chinese Ceramic Society

基　　金：中国自然科学基金(11804255,12074298);江苏省自然科学基金(BK20190212)。

摘　　要：Sr_(3)Sn_(2)O_(7):Sm^(3+)是一种被广泛研究的应力法光材料,但关于Sm^(3+)掺杂量的研究仍然存在缺失。本工作采用高温固相法制备Sr_(3-x)Sn_(2)O_(7):x Sm^(3+)。在Sr_(3)Sn_(2)O_(7)中掺入少量Sm^(3+)后,样品仍然保持着非中心对称的双钙钛矿结构。样品在受到紫外灯激励或应力施加之后,能展现出稳定的光致发光、长余辉和应力发光性能,且这三者的光谱显示出一致性。应力发光来源于Sm^(3+)的^(4)G_(5/2)激发态向^(6)H_(J)(J=5/2,7/2,9/2)基态的电子跃迁。通过调控x值对其发光性能进行优化,在x=0.020时性能最好。Sm^(3+)掺杂量的变化对应力发光性能的影响,既对现有的相关工作进行了补充,同时也能为未来的相关研究起到参考或指导的作用。Sr_(3)Sn_(2)O_(7):Sm^(3+)is a widely studied mechanoluminescent material,but there is still a lack of research on the doping amount of Sm^(3+).In this paper,Sr_(3-x)Sn_(2)O_(7):x Sm^(3+)was prepared by a high-temperature solid-state method.A sample of Sr_(3)Sn_(2)O_(7)with a small amount of Sm^(3+)still maintains a non-centrosymmetric double perovskite structure.The sample prepared has a stable photoluminescence,a long afterglow and mechanoluminescence after UV excitation or load application.The mechanoluminescence originates from the electron transition from the^(4)G_(5/2)excited state of Sm^(3+)to the^(6)H_(J)(J=5/2,7/2,9/2)ground state.The luminescence performance was optimized by adjusting the value of x,and the optimum performance was achieved when x=0.020.This study can provide a guidance for the future related research.

关 键 词：锡锶氧化物 三价钐离子 双钙钛矿 应力发光 

分 类 号：O482.31[理学—固体物理]