首页|Excitation-wavelength-dependent persistent luminescence from single-component nonstoichiometric CaGaxO4∶Bi for dynamic anti-counterfeiting

Excitation-wavelength-dependent persistent luminescence from single-component nonstoichiometric CaGaxO4∶Bi for dynamic anti-counterfeiting

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  • 国家科技期刊平台
  • NETL
  • NSTL
  • 万方数据
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 CaGaxO4∶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 Bi3+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.

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

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School of Chemical Engineering and Light Industry,Guangdong University of Technology,Guangzhou,China

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

Guangdong Laboratory of Chemistry and Fine Chemical Industry Jieyang Center,Jieyang,China

School of Optoelectronic Engineering& CQUPT-BUL Innovation Institute,Chongqing University of Posts and Telecommunications,Chongqing,China

Nanchang Research Institute,Sun Yat-sen University,Nanchang,Jiangxi,China

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2024

10.1038/s41377-024-01635-7

光:科学与应用(英文版)
中国科学院长春光学精密机械与物理研究所

光:科学与应用(英文版)

CSTPCD
ISSN：2095-5545
年,卷(期)：2024.13(12)