Effect of air annealing on the optical properties and luminescence performance of Ce:YAG ceramics for light-emitting diodes at different Ce concentrations

被引：10
|
作者：
Li, Xiaoyun [1 ,3 ]
Chen, Jian [1 ,2 ]
Liu, Zhuguang [1 ,2 ]
Deng, Zhonghua [1 ,2 ]
Huang, Qiufeng [1 ,2 ]
Huang, Jiquan [1 ,2 ]
Guo, Wang [1 ,2 ]
机构：
[1] Chinese Acad Sci, Fujian Inst Res Struct Matter, Key Lab Optoelect Mat Chem & Phys, Fuzhou 350002, Peoples R China
[2] Fujian Sci & Technol Innovat Lab Optoelect Inform, Fuzhou 350108, Fujian, Peoples R China
[3] Fujian Normal Univ, Coll Chem & Mat Sci, Fuzhou 350002, Peoples R China
来源：
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2021年 / 41卷 / 08期
关键词：
Transparent ceramics; Annealing; Doping concentration; Ce oxidation;
D O I：
10.1016/j.jeurceramsoc.2021.03.022
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
(Y1-x%Cex%)3Al5O12 (x = 0.2,0.4,0.6,0.8,1.0) transparent ceramics were fabricated by vacuum sintering technology, followed by air annealing at different temperatures. Transmittance of ceramics, valence of cerium, and luminescent properties with varying annealing temperatures are studied in detail. The negative effect of Ce3+ oxidation induced by annealing gets increasingly evident when Ce concentration increases. Collaborating Ce: YAG ceramics with InGaN blue chips, light-emitting diodes (LEDs) with superior performance were constructed. The relationships between Ce concentration, annealing temperature, and luminous flux of LEDs are elucidated, showing that the optimized annealing temperature of Ce:YAG ceramics decreases from 1200 ?C to 900 ?C as Ce concentration increases from 0.2 at% to 1.0 at%. The luminous fluxes of optimized LEDs increase by -10 % compared with that of unannealed LEDs.
引用
收藏
页码：4590 / 4597
页数：8
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