Single-component and white light-emitting phosphor BaAl2Si2O8: Dy3+, Eu3+ synthesis,luminescence, energy transfer,and tunable color |
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| Affiliation: | 1. Air Force Research Laboratory, Sensors Directorate, Wright Patterson AFB, OH, 45433, USA;2. SURVICE Engineering, Dayton, OH, 45431, USA;1. Institute of Chemistry, Saratov State University, Astrakhanskaya 83, 410012 Saratov, Russia;2. SPС Nanostructured Glass Technology Ltd, 50 years of October av. 101, 410033, Saratov, Russia;3. Faculty of Nano- and Biomedical Technologies, Astrakhanskaya 83, Saratov State University, 410012 Saratov, Russia;4. Faculty of Physics, Saratov State University, Astrakhanskaya 83, 410012 Saratov, Russia;5. Saint-Petersburg State University, Universitetskii pr. 26, 198504 Saint-Petersburg, Russia;1. Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China;2. School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China;3. College of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin 300072, China;4. Institute of Information Science and Technology, Department of Physics and Mechanical & Electrical Engineering, Hubei University of Education, Wuhan 430205, China;1. Department of Physics, Saveetha Univeristy, Chennai 602 105, India;2. Department of Nuclear Physics, University of Madras, Chennai 600 025, India;1. Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, PR China;2. College of Environmental and Chemical Engineering, Heilongjiang University of Science and Technology, Harbin 150022, PR China;3. School of Mathematical Science, Heilongjiang University, Harbin 150080, PR China |
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| Abstract: | A series of Dy3+ - Eu3+ co-doped BaAl2Si2O8 phosphors were prepared via the conventional solid-state reaction method. Their crystal structure, luminescent characteristic and lifetime were investigated. The optimum doping concentrations of Dy3+and Eu3+ are both 0.05 for Dy3+ or Eu3+ singly doped BaAl2Si2O8. Furthermore, BaAl2Si2O8: 0.05Dy3+ and BaAl2Si2O8: 0.05Eu3+ emits yellow and red light. The emission color of BaAl2Si2O8: Dy3+, Eu3+ could be tuned from yellow to white due to the energy transfer. This energy transfer from Dy3+ to Eu3+ was confirmed and investigated by photoluminescence spectra and the decay time of energy donor Dy3+ ions. With constantly increasing Eu3+ concentration, the energy transfer efficiency from Dy3+ to Eu3+ in BaAl2Si2O8 host increased gradually and reached as high as 81%, the quantum yield was about 47.43%. BaAl2Si2O8: Dy3+, Eu3+ phosphors can be effectively excited by UV (about 348 nm) light and emit visible light from yellow to white by altering the concentration ratio of Dy3+ and Eu3+, indicating that the phosphors have potential applications as a white light-emitting phosphor for display and lighting. |
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| Keywords: | Quantum yield Energy transfer w-LEDs |
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