Up-conversion luminescence and optical temperature sensing behaviour of Yb3+/Er3+ codoped CaWO4 material |
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| Affiliation: | 1. Department of Mechanical Engineering, College of Engineering and Applied Science, University of Wisconsin Milwaukee, Milwaukee, WI 53211, USA;2. Department of Chemistry, School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan 430070, Hubei, PR China;3. Department of Applied Chemistry, School of Advanced Materials and Nanotechnology, Xidian University, Xi''an 710126, Shaanxi, PR China;4. Chemistry Department, Brookhaven National Laboratory, Upton, NY 11973, USA;1. Key Lab of Advanced Transducers and Intelligent Control System, Ministry of Education and Shanxi Province, College of Physics and Optoelectronics, Taiyuan University of Technology, Taiyuan, 030024, PR China;2. College of Materials & Environmental Engineering, Hangzhou Dianzi University, Hangzhou, 310018, PR China;1. Nanoscience Research Centre, Department of Physics, Nirmala College, Muvattupuzha 686661, Kerala, India;2. Department of Physics, Newman College, Thodupuzha 685585, Kerala, India;3. Microton Centre, Mangalore University, Mangalagangotri 574199, India;1. Department of Electronics and Radio Engineering, Kyung Hee University, Yongin 446-701, Republic of Korea;2. Department of Microelectronic Science and Engineering, Ningbo University, 315211 Ningbo, China;3. Department of Biomedical Engineering & Healthcare Industry Research Institute, College of Medicine, Kyung Hee University, Seoul 130-701, Republic of Korea;1. School of Materials Science and Engineering, Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, Shaanxi University of Science and Technology, Xi''an, 710021, China;2. School of Electronic Information and Artificial Intelligence, Shaanxi University of Science and Technology, Xi''an, 710021, China;3. School of Electrical and Control Engineering, Shaanxi University of Science and Technology, Xi''an, 710021, China;4. School of Arts and Sciences, Shaanxi University of Science and Technology, Xi''an, 710021, China |
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| Abstract: | Present article report on structural and optical properties of Er3+/Yb3+ codoped CaWO4 phosphors. Structural properties are explored using XRD and Raman technologies. The upconversion emission has been investigated with 980 nm excitation. The upconversion emission intensity is dependent on the concentrations of Yb3+ ions and reaches a maximum at 7%. Logarithmic plots of power dependencies reveal that the green and red emissions originate from a two-photon upconversion process. Based on the photon energy and the emission spectra, the possible upconversion processes and emission mechanisms are discussed. Finally, the optical temperature sensing properties has been performed using the fluorescence intensity ratio technique based on green upconversion emissions. Its temperature sensitivity is found to be above 0.0025 K-1 in the whole temperature range of 300–540 K, revealing this phosphor to be a promising optical temperature sensing material. |
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| Keywords: | Upconversion emission Power dependence FIR technique Sensor sensitivity |
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