蓝光LED激发深紫外上转换发光材料的光学定位与追踪应用  

Blue LED-excitable Deep Ultraviolet Upconversion Phosphor for Optical Locating and Tracking Application

作　　者：梁延杰[1] 刘景伟 闫劭 陈东讯 王笑军 LIANG Yan-jie;LIU Jing-wei;YAN Shao;CHEN Dong-xun;WANG Xiao-Jun(Key Laboratory for Liquid-Solid Structure Evolution and Processing of Materials,Ministry of Education,Shandong University,Jinan 250061,China;Department of Physics,Georgia Southern University,Statesboro,GA 30460,USA)

机构地区：[1]山东大学材料液固演变与加工教育部重点实验室,山东济南250061 [2]Department of Physics,Georgia Southern University,Statesboro,GA 30460,USA

出　　处：《发光学报》2022年第9期1436-1445,共10页Chinese Journal of Luminescence

基　　金：国家自然科学基金(51902184);山东省重点研发计划(重大科技创新工程)(2021CXGC011101);山东省自然科学基金博士基金(ZR2019BEM028)资助项目。

摘　　要：光发射波长小于320 nm的深紫外发光材料具有光子能量高和不受室内环境光干扰等特性,在光化学与光医学领域具有重要应用前景,近年来受到国内外学者的广泛关注。本文利用固相合成法制备了Pr^(3+)单掺和Pr^(3+)⁃Gd^(3+)共掺的LiYSiO_(4)∶Pr^(3+)和Li(Y,Gd)SiO_(4)∶Pr^(3+)深紫外上转换发光材料。在450 nm蓝光(激光或LED)激发下分别实现了C区紫外和窄带B区紫外上转换发光,发光峰值分别位于280 nm和313 nm。系统研究了蓝光激发功率对深紫外上转换发光性能的影响规律,证实了蓝光激发下的双光子上转换发光物理机制。探索利用LiYSiO_(4)∶Pr^(3+)作为光转换层,以蓝光LED作为激发源,设计构筑了新型荧光转换型UVC光源,并展示了该光源在室外光学定位与追踪领域的应用。Deep ultraviolet(UV)luminescent materials with emission wavelength shorter than 320 nm have great potential for photochemistry and photomedicine because of the unique spectral fea⁃tures of UV light including high-energy photon and interference-free by indoor ambient light,which have aroused significant attention in the past few years.In this paper,we have synthesized deep UV emissive LiYSiO_(4)∶Pr^(3+)and Li(Y,Gd)SiO_(4)∶Pr^(3+)phosphors by doping Pr^(3+)and Pr^(3+)-Gd3+ion pairs into LiYSiO_(4)host.Upon 450 nm blue light(laser or LED)excitation,these phosphors can emit light in the ultraviolet C and narrowband ultraviolet B through photon upconversion.The deep UV upconver⁃sion luminescence properties were investigated in detail by varying the excitation power of 450 nm blue laser,indicating that two-photon upconversion luminescence process is responsible for the deep UV emission.Deep UV light source has been successfully created through a combination of LiYSiO_(4)∶Pr^(3+)phosphor as luminescence converter and 450 nm LED as excitation source,which shows promising application in the optical locating and tracking field.

关 键 词：紫外上转换发光 紫外光源 Pr^(3+) Pr^(3+)-Gd^(3+) 光学定位与追踪 

分 类 号：O482.31[理学—固体物理]