Deep-trap ultraviolet persistent phosphor for advanced optical storage application in bright environments  

作　　者：Xulong Lv Yanjie Liang Yi Zhang Dongxun Chen Xihui Shan Xiao-Jun Wang 

机构地区：[1]Key Laboratory for Liquid-Solid Structure Evolution and Processing of Materials,Shandong University,Jinan 250061,China [2]Department of Physics,Georgia Southern University,Statesboro,GA 30460,USA

出　　处：《Light(Science & Applications)》2024年第11期2634-2648,共15页光（科学与应用)（英文版）

基　　金：supported by the Key Research and Development Program of Shandong Province(Major Scientific and Technological Innovation Project)(Grant No.2021CXGC011101);National Natural Science Foundation of China(Grant No.51902184);the“Qi-Lu Young Scholar Fund”from Shandong University.

摘　　要：Extensive research has been conducted on visible-light and longer-wavelength infrared-light storage phosphors,which are utilized as promising rewritable memory media for optical information storage applications in dark environments.However,storage phosphors emitting in the deep ultraviolet spectral region(200–300 nm)are relatively lacking.Here,we report an appealing deep-trap ultraviolet storage phosphor,ScBO_(3):Bi^(3+),which exhibits an ultranarrowband light emission centered at 299 nm with a full width at half maximum(FWHM)of 0.21 eV and excellent X-ray energy storage capabilities.When persistently stimulated by longer-wavelength white/NIR light or heated at elevated temperatures,ScBO_(3):Bi^(3+)phosphor exhibits intense and long-lasting ultraviolet luminescence due to the interplay between defect levels and external stimulus,while the natural decay in the dark at room temperature is extremely weak after X-ray irradiation.The impact of the spectral distribution and illuminance of ambient light and ambient temperature on ultraviolet light emission has been studied by comprehensive experimental and theoretical investigations,which elucidate that both O vacancy and Sc interstitial serve as deep electron traps for enhanced and prolonged ultraviolet luminescence upon continuous optical or thermal stimulation.Based on the unique spectral features and trap distribution in ScBO_(3):Bi^(3+)phosphor,controllable optical information read-out is demonstrated via external light or heat manipulation,highlighting the great potential of ScBO_(3):Bi^(3+)phosphor for advanced optical storage application in bright environments.

关 键 词：ULTRAVIOLET AMBIENT luminescence 

分 类 号：O43[机械工程—光学工程]