Enhancing upconversion emission and temperature sensing modulation of the La2(MoO4)3: Er3+, Yb3+ phosphor by adding alkali metal ions |
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| Affiliation: | 1. School of Electrical and Computer Engineering, Jilin Jianzhu University, Changchun 130118, China;2. College of Physics, Jilin University, China;1. College of Electronic and Optical Engineering & College of Microelectronics, Nanjing University of Posts and Telecommunications, Nanjing, 210023, People''s Republic of China;2. College of Science, Nanjing University of Posts and Telecommunications, Nanjing, 210023, People''s Republic of China;3. Key Laboratory of Radio Frequency and Micro-Nano Electronics of Jiangsu Province Nanjing, 210023 Jiangsu, People''s Republic of China;4. State Key Laboratory of Green Building Materials, China Building Materials Academy, No. 1 Guanzhuang Dongli Chaoyang District, Beijing, 100024, People''s Republic of China;5. School of Physics and Optoelectronics, Xiangtan University, People''s Republic of China;1. State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, PR China;2. Department of Materials Engineering, KU Leuven, Kasteelpark Arenberg 44, B-3001, Heverlee, Belgium;1. Department of Aerospace Advanced Materials & Chemical Engineering, Hanseo University, Seosan, 356-706, Republic of Korea;2. Laboratory of Coherent Optics, Kirensky Institute of Physics Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russia;3. Department of Photonics and Laser Technologies, Siberian Federal University, Krasnoyarsk, 660041, Russia;4. Laboratory of Optical Materials and Structures, Institute of Semiconductor Physics, SB RAS, Novosibirsk, 630090, Russia;5. Functional Electronics Laboratory, Tomsk State University, Tomsk, 634050, Russia;6. Research and Development Department, Kemerovo State University, Kemerovo, 650000, Russia;7. Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russia;8. Siberian Federal University, Krasnoyarsk, 660041, Russia;9. Department of Physics, Far Eastern State Transport University, Khabarovsk, 680021, Russia;10. Laboratory of Molecular Spectroscopy, Kirensky Institute of Physics Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russia |
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| Abstract: | Trivalent Er3+-doped La2(MoO4)3 upconversion phosphors with intense green emmision were synthesized at 800 °C by the solid-state reaction route, promoting the development of novel optical thermometry. The color emitted from the samples was minorly affected by the excitation power and doping concentration. Yb3+ is a better sensitizer for the La2(MoO4)3: Er3+ phosphor and it can enhance the emission intensity when a certain amount is co-doping in the system. The up-conversion luminescent mechanism was investigated using the pump power-dependent UC emission spectra. Alkali metal doping increased the up-conversion emission intensities drastically, and Li+ ions can enhance the luminous intensity by more than 20 times. The fluorescence intensity ratio of the transition emission 2H11/2-4I15/2 and 4S3/2-4I15/2 was used to study upconversion optical temperature sensing. The sensitivity changes from doping with diverse alkali metal ions and their effects on the optimal temperature range are discussed in detail. Alkali metal ions doping extended the temperature range, indicating that this phosphor is a potential candidate for temperature-sensing probes. |
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| Keywords: | Upconversion emission Optical thermometry Fluorescence intensity ratio Rare earth |
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