(Ce,Gd):YAG-Al2O3 composite ceramics for high-brightness yellow light-emitting diode applications |
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| Affiliation: | 1. Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, PR China;2. College of Chemistry and Materials Science, Fujian Normal University, Fuzhou 350002, PR China;3. Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou, Fujian, 350108, PR China;1. National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin, 150001, PR China;2. Oles Honchar Dnipropetrovsk National University, Dnipropetrovsk, Gagarin 72, Ukraine;1. College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, 325035, China;2. College of Optics and Electronic Science and Technology, China Jiliang University, Hangzhou, 310018, China;1. Laboratory of Micro-Nano Optoelectronic Materials and Devices, Key Laboratory of Materials for High-Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China;2. Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China;3. Shanghai Tech University, Shanghai 201210, China;4. Engineering Research Center of Optical Instrument and System, University of Shanghai for Science and Technology, No. 516 Jun Gong Road, Shanghai 200093, China;1. School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, PR China;2. School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin, 541004, PR China;3. Engineering Research Center of Optical Instrument and System, Ministry of Education and Shanghai Key Lab of Modern Optical System, University of Shanghai for Science and Technology, No. 516 Jungong Road, Shanghai, 200093, China;1. Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), School of Materials Science and Engineering, Northeastern University, Shenyang, 110819, China;2. Liaoning Engineering Laboratory of Special Optical Functional Crystals, College of Environmental and Chemical Engineering, Dalian University, Dalian, 116622, China;3. State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals, Kunming Institute of Precious Metals, Kunming, 650106, China;1. Key Laboratory of Transparent Opto-functional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201899, China;2. Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China;3. Shanghai Institute of Technology, Shanghai 2010418, China;4. College of Materials, Xiamen University, Xiamen 361005, China;5. School of Material Science and Engineering, Jiangsu University, Zhenjiang 212013, China |
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| Abstract: | (Ce,Gd):YAG-Al2O3 composite ceramics were prepared for high-brightness yellow LED (565?590 nm) applications. Phase fraction, microstructure, thermal quenching effect, and luminescent properties of composite ceramics with varying compositions were studied in detail. Collaborating composite ceramics with InGaN blue chips, the relationship between thermal conductivity, temperature rise during LED-driven phosphor conversion, and steady-state luminous efficiency were elucidated. As the proportion of Al2O3 increases from 0 to 40 wt%, the steady-state luminous efficiency of yellow LED is enhanced from 100.88–109.49 lm W?1, benefiting from the increased thermal stability and reduced operating temperature of ceramics (from 141.1–132.2 °C). Additionally, scattering behavior and extraction efficiency of composite ceramics with different thicknesses were investigated. |
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| Keywords: | Composite ceramics Yellow LEDs Thermal conductivity Operating temperature |
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