外文题目: Al2O3-YAG:Ce composite phosphor ceramic: a thermally robust and efficient color converter for solid state laser lighting
作者: Li, Shuxing; Zhu, Qiangqiang; Tang, Daiming; Liu, Xuejian; Ouyang, George; Cao, Liangliang; Hirosaki, Naoto; Nishimura, Toshiyuki; Huang, Zhengren; Xie, Rong-Jun
刊名: J. Mater. Chem. C
年: 2016 卷: 4 期: 37 页： 8648--8654
英文关键词:

EMITTING-DIODES; IN-GLASS; AL2O3; ALUMINA
英文摘要:
Solid state laser lighting is a newly emerging technology that combines a blue laser diode (LD) with a yellow-emitting phosphor converter to generate high-brightness white tight. Due to high flux irradiation as well as thermal attack from the incident laser, this technology draws a demanding requirement on the thermal performance of the color converter. In this work, we design a Al2O3-YAG:Ce phosphor ceramic with a unique composite structure, where yellow-emitting YAG:Ce particles are embedded in a non-luminescent Al2O3 matrix having high thermal conductivity. The large YAG:Ce particles (5-20 mu m) show good crystallinity and a high external quantum efficiency of 76% (upon 460 nm excitation) white the fine Al2O3 grains (0.5-2 mu m) contribute to the superior in-line transmittance of 55% at 800 nm by minimizing the birefringence related scattering. The phosphor ceramic exhibits a high thermal conductivity of 18.5 W m(-1) K-1 and a remarkable improvement in thermal stability (only an 8% reduction at 200 degrees C). When irradiated under 445 nm blue laser diodes, the phosphor ceramic shows no luminescence saturation even under a high power density of 50 W mm(-2), validating its suitability for high-power solid state laser lighting.


文献类型: 期刊论文
正文语种: English
收录类别: SCIEI
DOI: 10.1039/c6tc03215j


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