Multi-color mechano-luminescence of LaGaO_(3):Sm^(3+),Tb^(3+) via trap sharing for anti-counterfeiting and encryption  

作　　者：Ziyang Li Yajing Yan Ting Wang Shaoqing Wang Longchao Guo Wei Feng Lei Zhao Ziqi Wang Feng Zhao Jiaqi Chen Zhanhui Zhang Xuhui Xu Xue Yu 

机构地区：[1]School of Mechanical Engineering,Institute for Advanced Materials,Chengdu University,Chengdu,610106,China [2]Clinical Medical College&Affiliated Hospital of Chengdu University,Chengdu,610106,China [3]College of Materials and Chemistry&Chemical Engineering,Chengdu University of Technology,Chengdu,610059,China [4]College of Materials Science and Engineering,Baoji University of Arts and Sciences,Baoji,721013,China [5]Key Laboratory of Plasma Chemistry and Advanced Materials of Hubei Province,Wuhan Institute of Technology,Wuhan,430205,China [6]College of Materials Science and Engineering,Kunming University of Science and Technology,Kunming,650093,China

出　　处：《Journal of Rare Earths》2023年第12期1869-1875,I0002,共8页稀土学报（英文版）

基　　金：Project supported by the Yunnan Provincial Natural Science Foundation (202101AT070126);the Research Start-up Fund of Chengdu University of Technology (10912-KYQD2020-08476);Fund of Hubei Key Laboratory of Plasma Chemistry,Advanced Materials (KF202103);Sichuan Natural Science Foundation (2022YFH0108,2022JDJQ0030)。

摘　　要：Mechano-luminescence(ML) has been found diverse applications such as stress sensing,3-D signature,energy harvesting,and anti-counterfeiting,due to the unique properties of the corresponding ML phosphors performing in-situ and real-time response to mechanical stimulus.Trap-controlled ML materials realize reproducible,quantitative mechano-optical conversion resulting from the released carriers for the trap-mediated charge storage and release.Herein,modulating traps matters the controllable ML behavior for their promising applications.In this work,a deep trap distributed ranging from 0.9 to 1,3 eV is realized consecutively for the introduction of Sm^(3+)ions into LaGaO_(3) matrix,which contributes to the red emission at 600 nm under mechanical stimuli.Moreover,tunable ML emission modulated from 600to 545 nm is successfully achieved for the codopant of Tb^(3+)ions.It is unambiguously indicated that the released carriers from the trap sharing rather than an additional constructed trap contribute to the modulated ML color.Accordingly,multi-mode anti-counterfeiting and encryption are achieved with the as-explored Sm^(3+),Tb^(3+)co-activated ML phosphor.

关 键 词：LaGaO_(3):Sm^(3+) Tb^(3+)phosphors Mechano-luminescence Trap sharing Multi-color Rare earths 

分 类 号：TB34[一般工业技术—材料科学与工程]