Excitation-wavelength-dependent persistent luminescence from single-component nonstoichiometric CaGa_(x)O_(4):Bi for dynamic anticounterfeiting  

作　　者：Bo-Mei Liu Yue Lin Yingchun Liu Bibo Lou Chong-Geng Ma Hui Zhang Jing Wang 

机构地区：[1]School of Chemical Engineering and Light Industry,Guangdong University of Technology,Guangzhou,China [2]Ministry of Education Key Laboratory of Bioinorganic and Synthetic Chemistry,State Key Laboratory of Optoelectronic Materials and Technologies,School of Chemistry,Sun Yat-sen University,Guangzhou,China [3]Guangdong Laboratory of Chemistry and Fine Chemical Industry Jieyang Center,Jieyang,China [4]School of Optoelectronic Engineering&CQUPT-BUL Innovation Institute,Chongqing University of Posts and Telecommunications,Chongqing,China [5]Nanchang Research Institute,Sun Yat-sen University,Nanchang,Jiangxi,China

出　　处：《Light(Science & Applications)》2024年第12期3064-3075,共12页光(科学与应用)(英文版)

基　　金：supported by the National Key R&D Program of China(2023YFB3506600 and 2023YFB3506602);the Joint Funds of the National Natural Science Foundation of China and Yunnan Province(U1902222);National Natural Science Foundation of China(52161135110,52102195);Guangdong Provincial Science&Technology Project(2022A0505050032);Major Science and Technology Research and Development Project of Jiangxi Province(20223AAE01003).

摘　　要：Materials capable of dynamic persistent luminescence(PersL)within the visible spectrum are highly sought after for applications in display,biosensing,and information security.However,PersL materials with eye-detectable and excitation-wavelength-dependent characteristics are rarely achieved.Herein,a nonstoichiometric compound CaGa_(x)O_(4):Bi(x<2)is present,which demonstrates ultra-long,color-tunable PersL.The persistent emission wavelength can be tuned by varying the excitation wavelength,enabling dynamic color modulation from the green to the orange region within the visible spectrum.Theoretical calculations,in conjunction with experimental observations,are utilized to elucidate the thermodynamic charge transitions of various defect states,thereby providing insights into the relationship between Bi^(3+)emitters,traps,and multicolored PersL.Furthermore,the utility of color-tunable PersL materials and flexible devices is showcased for use in visual sensing of invisible ultraviolet light,multicolor display,information encryption,and anti-counterfeiting.These discoveries create new opportunities to develop smart photoelectric materials with dynamically controlled PersL for various applications.

关 键 词：luminescence VISIBLE DYNAMIC 

分 类 号：O61[理学—无机化学]