荧光粉
材料科学
千分尺
激光器
发光
光电子学
光学
复合数
二极管
热导率
热稳定性
发光二极管
量子效率
激光二极管
复合材料
物理
化学工程
工程类
作者
Luhan Wang,Jiawei Liu,Li Xu,Shuyang Bao,Yu Wang,Jiangdan Zhang,Xiaojuan Liang,Weidong Xiang
标识
DOI:10.1002/lpor.202200585
摘要
Abstract Phosphor‐in‐glass (PiG) film has been proposed as an ideal color converter in laser diodes (LDs) lighting for its advantages of outstanding thermal conductivity (TC) and superior efficiency. Herein, yellow‐emitting Y 1.31 Ce 0.09 Gd 1.6 Al 5 O 12 (Ce: GdYAG)‐PiG composite films are successfully elaborated through a practical blade‐coating approach. Systematical studies are performed on its microstructure, thermal stability, and luminescence performance pumped by LDs. Noteworthy, the highest internal quantum efficiency of film (94.2%) retains 97.1% of the raw phosphors (97%). Particularly, by further introducing micrometer BN with high TC as light scattering center to enhance heat dissipation and increase porosity, the thermal and optical properties of the sample are greatly improved. The luminescence intensity of the sample at 423 K is increased to 1.8 times that at 298 K. The thermal diffusion (TD) and TC of the sample are increased from 1.571 to 4.227 mm 2 s −1 and 6.4 to 13.0 W m −1 K −1 , respectively. At the same time, the maximum saturation threshold under laser irradiation of Ce: GdYAG + micrometer BN composite film is raised from 3.12 to 5.42 W mm −2 and 260.6 to 354.1 lm, respectively. The combination of excellent optical and thermal performances, coupled with facile and low‐cost synthetic strategy, could push forward the practical application in solid‐state laser lighting.
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