无机材料学报2022，Vol.37Issue(12)：1358-1364,7.DOI:10.15541/jim20220249
高功率激光照明用Al2O3-YAG:Ce复相陶瓷荧光体的组分设计与性能优化
Component Regulation and Performance Optimization of Al2O3-YAG:Ce Composite Ceramic Phosphors for High-power Laser Lighting
摘要
Abstract
Solid-state laser lighting fabricated by combining blue laser diodes (LDs) and yellow-emitting phosphor converters has attracted great attention in high-luminance applications. However, the achievement of high-power laser lighting is significantly affected by the thermal quenching effect of phosphor converter materials. Therefore, component regulation and performance optimization are required to improve the thermal conductivity and luminescence uniformity of phosphor converters. In this work, a series of Al2O3-YAG:Ce composite ceramic phosphors with different Al2O3 contents were prepared by solid-state reaction sintering. The influences of Al2O3 contents on the microstructure, phase composition, optical properties and thermal performance of the Al2O3-YAG:Ce ceramic phosphors were investigated in detail. The total transmittance of the Al2O3-YAG:Ce ceramic phosphors at 800 nm tends to decline (82.6％→23.6％) with the increase of Al2O3 content (0→90％, weight ratio). Both excitation and emission intensity of the Al2O3-YAG:Ce ceramic phosphors initially increase and then decrease with increasing Al2O3 content. When the weight ratio of Al2O3/Al2O3-YAG:Ce is 70％, the ceramic phosphor exhibits a high thermal conductivity of 25.7 W·m–1·K–1 at room temperature and the highest emission intensity. A high luminous flux of 3724 lm and luminous efficacy of 239.4 lm·W–1 are obtained when pumping the 70％ Al2O3-YAG:Ce ceramic phosphor with blue LDs at a power density of 20 W·mm–2. Additionally, the luminous efficacy only decreases by 10.5％ and the luminous flux continues to increase without showing luminescence saturation, when the power density increases from 1 W·mm–2 to 20 W·mm–2. Therefore, the Al2O3-YAG:Ce composite ceramic phosphors are promising in high-power laser lighting for excellent luminous efficiency and improved thermal stability.关键词
Al2O3-YAG:Ce/激光照明/流明效率/组分设计/性能优化Key words
Al2O3-YAG:Ce/laser lighting/luminous efficacy/component regulation/performance optimization分类
化学化工引用本文复制引用
程梓秋,王雁斌,刘欣,代正发,陈昊鸿,田丰,陈鹏辉,李江..高功率激光照明用Al2O3-YAG:Ce复相陶瓷荧光体的组分设计与性能优化[J].无机材料学报,2022,37(12):1358-1364,7.基金项目
Foundation item:Strategic Priority Research Program of Chinese Academy of Sciences(XDA22010301) （XDA22010301）
