Robust YAG:Ce single crystal for ultra-high efficiency laser lighting  

作　　者：Yaqian Zhang Jianming Liu Yujie Zhang Haisheng Yang Yanxia Yu Qingyun He Xiaojuan Liang Yongfu Liu Weidong Xiang 

机构地区：[1]College of Chemistry and Materials Engineering,Wenzhou University,Wenzhou 325035,China [2]Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences,Ningbo 315201,China

出　　处：《Journal of Rare Earths》2022年第5期717-724,I0002,共9页稀土学报（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(51872207,51672192);the Key Research and Development Project in Zhejiang Province(2021C01024)。

摘　　要：At present,solid-state laser-driven lighting fabricated with blue laser diode(LD)and phosphor has been greatly developed in high-power lighting applications.The major obstacle is the luminescence saturation threshold of the fluorescence conversion material(YAG:Ce).In this work,we successfully prepared a series of high-quality and robust YAG:Ce single crystals.With high quantum efficiency(QE=92%),regular crystal structure and high thermal conductivity,the single-crystal has excellent ability to deal with high radiation flux and thermal accumulation generated by high power.Matching the single-crystal with the laser,the luminous efficiency up to 274 lm/W and saturation threshold of 12 W/mm^(2) were obtained.In addition,the influence of Ce doping concentration and sample processing conditions on the indicators in laser-driven white lighting was systematically studied.The results are of great significance and are believed to promote the development of solid-state laser-driven lighting.

关 键 词：YAG:Ce SINGLE-CRYSTAL Laser diodes Luminous efficiency Saturation threshold Rare earths 

分 类 号：TQ422[化学工程] TN249[电子电信—物理电子学]