White up-conversion luminescence and highly-sensitive optical temperature sensing in Na3La(VO4)2:Yb,Er,Tm,Ho phosphors |
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| Affiliation: | 1. Key Laboratory of New Energy and Rare Earth Resource Utilization of State Ethnic Affairs Commission, Key Laboratory of Photosensitive Materials & Devices of Liaoning Province, School of Physics and Materials Engineering, Dalian Minzu University, Dalian 116600, China;2. Department of Physics, Dalian Maritime University, Dalian 116026, China;1. Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan, 430074, China;2. College of Science, Jiujiang University, Jiujiang, 332005, China;1. School of Resource and Environmental Sciences, Wuhan University, Wuhan 430079, China;2. China Southern Power Grid Technology Co., Ltd., Guangzhou 510080, China;3. Electric Power Research Institute of Guangdong Power Grid Co. Ltd., Guangzhou 510080, China;1. Beijing Key Laboratory of Material Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Sciences and Technology, China University of Geosciences, Beijing 100083, China;2. Office of Scientific Research, Peking University, Beijing 100871, China;1. School of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, China;2. School of Mathematics, Physics and Statistics, Shanghai University of Engineering Science, Shanghai 201620, China;1. Department of Chemistry, Farhangian University, Tehran, Iran;2. Department of Chemistry, Faculty of Basic Sciences, Tarbiat Modares University, Tehran, Iran;3. Instituto de Electroquímica y Departamento de Química Física, Universidad de Alicante, 03080, Alicante, Spain;4. Research Center for Environmental Contaminants, Abadan University of Medical Sciences, Abadan, Iran;5. Department of Environmental Health Engineering, Abadan University of Medical Sciences, Abadan, Iran |
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| Abstract: | In this work, tunable white up-conversion luminescence was achieved in the Yb3+, Er3+, Tm3+, Ho3+ co-doped Na3La(VO4)2 phosphors under 980 nm excitation. The emissions of three primary colors are mainly attributed to the 2H11/2/4S3/2 → 4I15/2 transitions of Er3+, 1G4→3H6 transition of Tm3+, and 5F5→5I8 transition of Ho3+. White luminescence characteristics and mechanisms of up-conversion system were investigated in detail. In addition, the temperature sensing behaviors of multiple levels emission combinations for Na3La(VO4)2:Yb3+,Er3+,Tm3+,Ho3+ were analyzed by employing thermally coupled and non-thermally coupled energy levels. Based on the emissions of 3F2,3/1G4 energy levels, the maximum relative and absolute sensitivities were obtained to be 2.20%/K and 0.279 K–1. The design of up-conversion luminescence materials with high-quality white luminescence and excellent sensitivity performance is critical in the field of optical applications. |
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| Keywords: | Up-conversion White luminescence Temperature sensing Sensitivity Rare earths |
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