Patterned glass ceramic design for high-brightness high-color-quality laser-driven lightings  

作　　者：Qiugui HUANG Hang LIN Bo WANG Shisheng LIN Pengfei WANG Ping SUI Ju XU Yao CHENG Yuansheng WANG 

机构地区：[1]Key Laboratory of Optoelectronic Materials Chemistry and Physics,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350002,China [2]College of Chemistry and Materials Science,Fujian Normal University,Fuzhou 350007,China [3]Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China,Fuzhou 350108,China [4]School of Applied Physics and Materials,Wuyi University,Jiangmen 529020,China

出　　处：《Journal of Advanced Ceramics》2022年第6期862-873,共12页先进陶瓷（英文）

基　　金：This work is supported by the National Natural Science Foundation of China(Grant Nos.U2005213,11774346,51972303,51872288,and 11974350);the Fujian Provincial Key Project of Science&Technology(Grant No.2020H0035);the Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China(2021ZR134).

摘　　要：Up-to-date laser-driven lightings confront a challenge of simultaneously achieving good photometric and chromatic performances.Herein,the coupling of“patterned package design”and“phosphor wheel”was proposed and demonstrated effectively to deal with this tough issue,based on a new architecture of CaAlSiN3:Eu2+(CASN:Eu)glass ceramic film(GCF)on Y_(3)Al_(5)O_(12):Ce^(3+)(YAG:Ce)GC plate.The fabricated composite has no interface between the two functional layers and retains the admirable luminescent features from CASN:Eu and YAG:Ce for the microstructural integrity during co-sintering.The studies on laser-microcrystalline interactions reveal that the luminescence saturation is almost determined by thermal quenching for YAG:Ce,but is ascribed to thermal/intensity quenching which are equally crucial for CASN:Eu.Benefiting from the elaborate architecture design,good color chromaticity tunability was obtained,and severe photon reabsorption was reduced.Moreover,accompanied with the rotation induced increase of thermal convection to air and pulse-like excitation,the constructed lighting engine under blue laser driven shows bright white light with luminous flux(LF)higher than 1000 lm,adjustable chromaticity from cool to warm,and improved color rendering index(CRI)approaching to 70.

关 键 词：laser lightings glass ceramics(GCs) white light GARNETS nitrides 

分 类 号：TQ174[化学工程—陶瓷工业]