Additive-free Y2O3:Eu3+ red-emitting transparent ceramic with superior thermal conductivity for high-power UV LEDs and UV LDs |
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| Affiliation: | 1. College of Optics and Electronic Science and Technology, China Jiliang University, Hangzhou, 310018, China;2. Key Laboratory of Materials for High Power Lasers, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Science, Shanghai, 201800, China;1. State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, China;2. Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China;3. University of Chinese Academy of Sciences, Beijing, 100049, China;4. Key Laboratory of Transparent Opto-Functional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 201899, China;1. Jiangsu Key Laboratory of Advanced Laser Materials and Devices, School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou 221116, China;2. School of Electrical and Electronic Engineering, Nanyang Technological University, 639798, Singapore;3. School of Materials Science and Engineering, Nanyang Technological University, 639798, Singapore;4. College of New Materials and New Energies, Shenzhen Technology University, Shenzhen 518118, China;1. Engineering Ceramics Department, Korea Institute of Materials Science 797 Changwondaero, Changwon, Gyeongnam 641-831, Republic of Korea;2. Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry of Education Key Laboratory for Green Preparation and Application of Functional Materials, School of Material Science and Engineering, Hubei University, 368 Youyi Avenue, Wuhan, Hubei 430062, China;1. Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan, 430074, China;2. College of Mechanical and Materials Engineering, Jiujiang University, Jiujiang, 332005, China;3. College of Science, Jiujiang University, Jiujiang, 332005, China |
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| Abstract: | To obtain red-emitting luminescent material for high-power UV LED and UV LD applications, an additive-free Y2O3:Eu3+ phosphor ceramic was successfully prepared in this work. The nitrate pyrogenation method is applied to obtain raw nanopowders with high reactivity, and a hybrid sintering method combining low-temperature presintering and subsequent hot isostatic pressing (HIP) is then applied to realize full densification of the final ceramic products. The effects of the presintering temperature on the density, microstructural, and optical properties are investigated in detail. The HIP-treated Y2O3:Eu3+ ceramic presintered at 1450 °C exhibits a high transmittance near 80 % at 600 nm. Due to the nonuse of sintering additives, the thermal conductivity of Y2O3:Eu3+ ceramic product reaches 10.9 Wm?1 K?1 at room temperature. The achieved Y2O3:Eu3+ ceramic also exhibits good applicability under the excitation of a UV LED chip and UV laser light, showing promise as a color converter for high-power UV LED and UV LD applications. |
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| Keywords: | Additive-free ceramic Phosphor ceramic Superior thermal conductivity |
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