Design of a CaAlSiN3:Eu/glass composite film: Facile synthesis,high saturation-threshold and application in high-power laser lighting |
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| Affiliation: | 1. Lab of New Energy Materials and Devices, School of Physics and Electronic Information, Henan Polytechnic University, Jiaozuo, 454000, China;2. Diode Lasers and LED Systems Group, Department of Photonics Engineering, Technical University of Denmark, Roskilde, 4000, Denmark;3. Fujian Engineering Research Center for Solid-State Lighting, Department of Electronic Science, Xiamen University, Xiamen, 361005, China;4. School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450001, China;1. Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, 430074, China;2. School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China;1. College of Optical and Electronic Technology, China Jiliang University, Hangzhou, Zhejiang 310018, China;2. College of Materials, Xiamen University, Xiamen, Fujian 361005, China;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. State Key Laboratory of High-Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, 1295 Dingxi Road, Shanghai, 200050, China;2. University of Chinese Academy of Sciences, Beijing, 100049, China;3. College of Materials, Xiamen University, Xiamen, 361005, China;4. Suzhou Institute, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Suzhou, 215499, China;5. Ningbo Institute of Industrial Technology, Ningbo, 315000, China;6. Supervision Laser Technology (Suzhou) Company Limited, Suzhou, 215000, China;1. School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;2. State Key Laboratory of Coal Combustion and Thermal Packaging Laboratory, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China;3. Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China;4. State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China;1. School of Physics and Electronic Information, Henan Polytechnic University, Jiaozuo 454000, China;2. Xiamen Talentmats New Materials Science & Technology LLC, Xiamen 361015, China;3. Glass Coatings and Concepts LLC, A Subsidiary of Shepherd Materials Science Companies, Monroe 45069, United States |
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| Abstract: | Even though CaAlSiN3:Eu2+ (CASN) is, in many regards, a highly suitable red phosphor that can be used in white light-emitting diodes, it can hardly be used in high-power laser-lighting because of its low saturation-threshold. By using CASN-based composite ceramics, it is possible to increase the threshold but new difficulties appear. These include complex and expensive synthesis, while the saturation-threshold still has room for improvement. In this study, we prepare a CASN/glass composite film, using an industry-friendly blade-coating method. The film has a high internal quantum efficiency of 79%, which suggests low conversion loss. Under 1.17 W blue laser excitation, a high luminous efficacy of 21.0 lm/W can be obtained. More importantly, the composite film shows a record-high saturation-threshold of more than 12.7 W (∼320 W/cm2) blue laser excitation. With these outstanding properties, CASN/glass composite films may open doors towards commercially viable red color converters for high-power laser-lighting applications. |
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| Keywords: | High-power laser-lighting Composite film Blade-coating Red phosphor |
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