期刊
JOURNAL OF MATERIALS CHEMISTRY C
卷 9, 期 32, 页码 10487-10496出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1tc02202d
关键词
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资金
- National Natural Science Foundation of China [51872033]
- State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals [SKL-SPM-202016, SKL-SPM-202019]
- Research Start-up Fund of Foshan Graduate School of Northeastern University
A novel MgO-YAG:Ce composite ceramic with excellent optical and thermal properties was fabricated by hot pressing, showing promising potential as a phosphor converter for high-power laser-driven lighting.
The widespread application of laser diodes (LDs) in high-brightness lighting is limited by the insufficient heat dissipation of colour converters due to high-power laser irradiation. In this study, a novel MgO-YAG:Ce composite ceramic with excellent optical and thermal properties was fabricated by hot pressing. The thermal conductivity of the MgO-YAG:Ce composite ceramic is 14-21% higher than that of the Al2O3-YAG:Ce composite ceramic in the temperature range of 25-200 degrees C. When pumped by blue LDs with 1 W mm(-2), the MgO-40 vol% YAG:Ce composite ceramic produces white light with a luminous efficacy of 292 lm W-1. Moreover, it exhibits a luminous saturation threshold of as high as 32.2 W mm(-2) and a maximal luminous flux of 3979 lm. These results indicate that MgO-YAG:Ce composite ceramic is a promising phosphor converter for high-power laser-driven lighting.
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