The luminescence properties,energy transfer mechanism of the color tunable and high quantum efficiency LaAl2.03B4O10.54: Ce3+, Tb3+ phosphors |
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| Affiliation: | 1. School of Mechanical Engineering, Yeungnam University, Gyeongsan, Gyeongbuk 38541, Republic of Korea;2. Department of Automotive Engineering, Yeungnam University, Gyeongsan, Gyeongbuk 38541, Republic of Korea;3. Semiconductor Nanodevice Research Lab. (SNRL), Department of Physics, College of Science, Yeungnam University, Gyeongsan, Gyeongbuk 38541, Republic of Korea;1. College of Electronic Science and Technology Shenzhen University, Shenzhen, Guangdong, 518069, People''s Republic of China;2. Chinese Academy of Sciences Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, People''s Republic of China;3. Key Laboratory of Quantum Information, School of Physical Sciences, University of Science and Technology of China, Hefei, Anhui, 230026, People''s Republic of China;4. Department of Physics, Abdual Wali Khan University Mardan, Pakistan;5. Department of Materials Science and Engineering, University of Ioannina, GR-451 10, Ioannina, Greece;1. Leshan Ecological Environment Monitoring Center of Sichuan Province, Leshan, 614000, China;2. School of Physics and Telecommunications Engineering, Zhoukou Normal University, Zhoukou, 466001, China;3. Advanced Materials Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan, 250014, China |
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| Abstract: | Tb3+ is a typical green emitting luminescence center in inorganic compounds. However, the absorption of Tb3+ is very weak in ultraviolet spectral region (from 240 to 400 nm). Ce3+ is often used as a sensitizer to transfer energy to Tb3+. In this paper, Ce3+ and Tb3+ were co-doped into a novel aluminates-borates LaAl2.03B4O10.54. Ce3+ can absorb UV light (from 240 to 340 nm) and transfer absorbed energy to co-doped Tb3+ effectively and bring bright green emission of Tb3+. The crystal structure and fluorescence spectra of phosphors, the efficiency of energy transfer between Ce3+ and Tb3+, decay dynamics, the thermal stability and internal quantum efficiency of luminescence have been investigated in detail. These results indicate that the color tunable LaAl2.03B4O10.54: Ce3+, Tb3+ phosphor is a potential green-emitting material. Especially, analysis about the relationship of the doping concentration of luminescence centers and thermal stability of luminescence points out a feasible way to enhance the thermal stability of luminescence in the future. |
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| Keywords: | Phosphor The first-principle Thermal stability |
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