Self-recoverable NIR mechanoluminescence from Cr^(3+) doped perovskite type aluminate  

作　　者：Peishan Shao Puxian Xiong Yao Xiao Zhicong Chen Dongdan Chen Zhongmin Yang 

机构地区：[1]State Key Laboratory of Luminescent Materials and Devices,School of Materials Science and Engineering,School of Physics and Optoelectronics,Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques,Guangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and Devices,South China University of Technology,Guangzhou 510641,China [2]State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,China

出　　处：《Advanced Powder Materials》2024年第2期17-25,共9页先进粉体材料（英文）

基　　金：We gratefully acknowledge the financial support from the National Natural Science Foundation of China(No.52202003);Guangdong Basic and Applied Basic Research Foundation(No.2023A1515011893);State Key Laboratory of Powder Metallurgy,Central South University,Changsha,China(No.Sklpm-KF-27);Guangzhou Basic and Applied Basic Research Foundation(No.SL2022A04J00746)。

摘　　要：Mechanoluminescent(ML)materials,which have the ability to convert mechanical energy to optical energy,have found huge promising applications such as in stress imaging and anti-counterfeiting.However,the main reported ML phosphors are based on trap-related ones,thus hindering the practical applications due to the requirement of complex light pre-irradiation process.Here,a self-recoverable near infrared(NIR)ML material of Lali-xO:xCr^(3+)(x=0.2%,0.4%,0.6%,0.8%,1.0%,and 1.2%)has been developed.Based on the preheating method and corresponding ML performance analysis,the influences of residual carriers are eliminated and the detailed dynamic luminescence process analysis is realized.Systematic experiments are conducted to reveal the origin of the ML emissions,demonstrating that ML is dictated more by the non-centrosymmetric piezoelectric crystal characteristic.In general,this work has provided significant references for exploring more efficient NIR ML materials,which may provide potential applications in anti-counterfeiting and bio-stress sensing.

关 键 词：Cr^(3+) NIR ML Self-recoverability PIEZOELECTRICITY Trap 

分 类 号：O61[理学—无机化学]