Cyan-green-emitting Ca_(3)Sc_(2)Si_(3)O_(12):Ce^(3+)transparent ceramics:A promising color converter for high-brightness laser lighting  

作　　者：Huajun Wu Hao Wu Guo-Hui Pan Liangliang Zhang Zhendong Hao Jiahua Zhang 

机构地区：[1]State Key Laboratory of Luminescence and Applications,Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China [2]Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Journal of Advanced Ceramics》2023年第9期1731-1741,共11页先进陶瓷（英文）

基　　金：This work was partially supported by National Natural Science Foundation of China(Grant Nos.U22A20139,52102192,51772286,11974346,12074373,52072361,and 12074374);National Key R&D Program of China(Grant No.2021YFB3502701);Youth Innovation Promotion Association CAS(Grant No.2020222);Key Research and Development Program of Jilin Province(Grant Nos.20210201024GX,20220101208JC,and 20230101123JC);Changchun Science and Technology Planning Project(Grant No.21ZGY05);the Opening Project Key Laboratory of Transparent Opto-functional Inorganic Material,Chinese Academy of Sciences.

摘　　要：Transparent phosphor ceramics have received increasing attention for high-brightness laser lighting,but commercially available phosphor ceramics are currently mainly limited to yellow YAG:Ce and green LuAG:Ce garnets,leaving a“cyan cavity”which is an obstacle to realizing full-color lighting.Achieving new phosphor ceramics capable of filling the cavity is a challenge.Herein,for the first time,cyan-green-emitting Ca_(3)Sc_(2)Si_(3)O_(12):Ce^(3+)(CSS:Ce)transparent ceramics have been successfully developed by two-step sintering technique under vacuum.The as-prepared CSS:Ce ceramics present high relative density of 99.7%and optical transmittance of 71%in the cyan-green spectral region.It exhibits an efficient band emission peaking at 504 nm(under 450 nm excitation)with internal/external quantum efficiency of 91%/62%.Furthermore,it has excellent thermal stability with a thermal quenching temperature(T_(0.5))of 838 K,approximately 100 K higher than that of LuAG:Ce ceramics(738 K).In addition,the CSS:Ce ceramics can withstand blue laser density of 45.6 W/mm^(2)and meanwhile generates cyan-green light with a forward luminous flux of 813 lm and forward luminous efficacy of 162 lm/W.The CSS:Ce transparent ceramics exhibit excellent luminescence performance comparable to the commercial LuAG:Ce ceramics and could be a highly promising color converter for high-brightness laser lighting.

关 键 词：transparent ceramics color converter laser lighting garnet Ca_(3)Sc_(2)Si_(3)O_(12)(CSS) 

分 类 号：TN312.8[电子电信—物理电子学] TQ174.758.23[化学工程—陶瓷工业]