Blue LED-pumped intense short-wave infrared luminescence based on Cr^(3+)-Yb^(3+)-co-doped phosphors

查看全文 作　　者：Yan [1]Zhang;Shihai [1]Miao;Yanjie [1]Liang;Chao [2]Liang;Dongxun [1]Chen;Xihui [1]Shan;Kangning [1]Sun;Xiao-Jun [3]Wang

机构地区：[1]Key Laboratory for Liquid-Solid Structure Evolution and Processing of Materials,Ministry of Education,Shandong University,Jinan 250061,China;[2]Jiangsu Bree Optronics Co.,Ltd,Nanjing 211103,China;[3]Department of Physics,Georgia Southern University,Statesboro,GA 30460,USA

出　　处：《Light(Science & Applications)》索引2022年第11卷第6期,共12页

基　　金：This work was financially supported by the National Natural Science Foundation of China(Grant no.51902184);Key Research and Development Program of Shandong Province(Major Scientific and Technological Innovation Project)(Grant no.2021CXGC011101);the Natural Science Foundation of Shandong Province(Grant no.ZR2019BEM028). 摘　　要：The growing demand for spectroscopy applications in the areas of agriculture,retail and healthcare has led to extensive research on infrared light sources.The ability of phosphors to absorb blue light from commercial LED and convert the excitation energy into long-wavelength infrared luminescence is crucial for the design of cost-effective and high-performance phosphor-converted infrared LEDs.However,the lack of ideal blue-pumped short-wave infrared(SWIR)phosphors with an emission peak longer than 900 nm greatly limits the development of SWIR LEDs using light converter technology.Here we have developed a series of SWIR-emitting materials with high luminescence efficiency and excellent thermal stability by co-doping Cr^(3+)-Yb^(3+) ion pairs into Lu_(0.2)Sc_(0.8)BO_(3) host materials.Benefitting from strong light absorption of Cr^(3+) in the blue waveband and very efficient Cr^(3+)→Yb^(3+) energy transfer,the as-synthesized Lu_(0.2)Sc_(0.8)BO_(3):Cr^(3+),Yb^(3+) phosphor emits intense SWIR light in the 900-1200 nm from Yb^(3+) under excitation with blue light at~460 nm.The optimized phosphor presents an internal quantum yield of 73.6%and the SWIR luminescence intensity at 100℃can still keep 88.4%of the starting value at 25℃.SWIR LED prototype device based on Lu0.2Sc0.8BO3∶Cr^(3+)Yb^(3+) phosphor exhibits exceptional luminescence performance,delivering SWIR radiant power of 18.4 mW with 9.3%of blue-to-SWIR power conversion efficiency and 5.0%of electricity-to-SWIR light energy conversion efficiency at 120 mA driving current.Moreover,under the illumination of high-power SWIR LED,covert information identification and night vision lighting have been realized,demonstrating a very bright prospect for practical applications. 关键词：LUMINESCENCE INTENSE wave

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Blue LED-pumped intense short-wave infrared luminescence based on Cr^(3+)-Yb^(3+)-co-doped phosphors

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