锆与镁掺杂铝酸锶的应力发光与余辉调控  

Mechanoluminescence and afterglow modulation of Zr and Mg doped strontium aluminate

作　　者：黄泽锋 罗江承 任碧赟 张鲜辉 李旭 郑元钿 朱明炬 梁天龙 张祺安 方子奕 陈冰 傅愉 彭登峰 Zefeng Huang;Jiangcheng Luo;Biyun Ren;Xianhui Zhang;Xu Li;Yuandian Zheng;Mingju Zhu;Tianlong Liang;Qi’an Zhang;Ziyi Fang;Bing Chen;Yu Fu;Dengfeng Peng(School of Physics and Optoelectronic Engineering,Shenzhen University,Shenzhen 518061,China;Institute of Intelligent Optical Measurement and Detection,Shenzhen University,Shenzhen 518061,China)

机构地区：[1]深圳大学物理与光电工程学院,深圳518061 [2]深圳大学智能光测研究院,深圳518061

出　　处：《科学通报》2023年第34期4716-4725,共10页Chinese Science Bulletin

基　　金：国家自然科学基金(62275170,61875136);广东省杰出青年基金(2022B1515020054)资助。

摘　　要：应力发光材料是一类可以在机械力作用下直接发光的智能材料.其中,铝酸盐具有出色的应力发光和长余辉性能,被广泛研究.本研究不同于以往主要关注应力发光或长余辉中的单一性质,而是系统探究了不同添加物对铝酸锶应力发光、光致发光、长余辉和应力长余辉的复合影响.结果表明,硼酸对发光强度的提升与掺杂离子的种类和浓度存在关联.此外,Zr掺杂能显著改善材料的烧结均匀性和发光均匀性,最佳掺杂浓度为2%,此时应力发光和长余辉发光强度分别提高134%和278%.在此基础上,共掺Mg会导致应力发光强度降低50%以上,但长余辉强度增加了100.76%,并伴随着吸光速率减缓.本研究还比较了6个样品的应力诱导余辉曲线,测得Zr/Dy共掺样品表现出极佳的应力长余辉,而去除10%Al原子的样品展现出极低的应力余辉,仅为3 s.共掺8%Mg将导致应力余辉在经过约2.5 s后便衰退至无明显应力余辉的曲线以下.Mechanoluminescent materials represent a novel category of intelligent luminescent materials capable of directly emitting light when subjected to mechanical forces such as compression,friction,torsion,and even ultrasound.Among the diverse range of mechanoluminescent materials,aluminate compounds demonstrate significant promise as elastic mechanoluminescent materials with exceptional luminescence characteristics.Notably,aluminate materials have also been extensively investigated as long afterglow phosphors during the 1960s,exhibiting broad-spectrum light emission centered around 520 nm when doped with Eu.Capitalizing on its environmentally friendly composition and remarkable long afterglow performance,strontium aluminate materials have been produced on a large scale for industrial applications in various fields.However,the impressive long afterglow and mechanoluminescence properties exhibited by strontium aluminate can be traced back to the internal 4f-5d electron transition process.Previous studies have predominantly examined these two properties in isolation,overlooking the inherent connection between them.This compartmentalized approach has hindered the comprehensive advancement of these materials.To address this limitation,our study aims to explore the intrinsic principles by employing strategies such as cation and anion substitution,matrix structure adjustment,and the use of additives to synthesize strontium aluminate materials through simple solid-state methods.Our investigation focuses on effectively regulating the afterglow,mechanoluminescence,and stress-induced afterglow properties of strontium aluminate simultaneously.In the initial phase of our study,we investigate the influence of boric acid additives and the alteration of the Al/Sr atomic ratio in the matrix on the luminescence properties of the material.Our findings reveal that the enhancement effect of boric acid varies significantly with different doping ions and concentrations,thereby partially elucidating the divergent optimal ion doping concentr

关 键 词：应力发光 应力诱导长余辉 SrAl_(2)O_(4) 掺杂 智能传感 

分 类 号：TB381[一般工业技术—材料科学与工程]