High luminescent brightness and thermal stability of red emitting Li3Ba2Y3(WO4)8:Eu3+ phosphor |
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| Affiliation: | 1. Key Lab of Advanced Transducers and Intelligent Control System of Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, PR China;2. College of Physics and Optoelectronics, Taiyuan University of Technology, Taiyuan 030024, PR China;1. College of Chemistry and Chemical Engineering, Weifang University, Weifang, Shandong 261061, China;2. Fujian Institute of Research on the Structure of Matter, The Chinese Academy of Sciences, Fuzhou, Fujian 350002, China;3. Department of Chemistry and Chemical Engineering, Huainan Normal University, Huainan, Anhui 232001, China;4. School of Chemistry and Materials Engineering, Changshu Institute of Technology, Changshu, Jiangsu 215500, China;1. Institute of Electro Ceramics & Devices, School of Materials Science and Engineering, Hefei University of Technology, Hefei, 230009, PR China;2. School of Mechanical Engineering, Hefei University of Technology, Hefei, 230009, PR China;1. State key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China;2. University of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | A series of Li3Ba2Y3?x(WO4)8:xEu3+ (x=0.1, 1, 1.5, 2 and 2.8) phosphors were synthesized by a high temperature solid-state reaction method. Under the excitation of near ultraviolet (NUV) light, the as-prepared phosphor exhibits intense red luminescence originating from the characteristic transitions of Eu3+ ions, which is 1.8 times as strong as the commercial Y2O2S:Eu3+ phosphor. The optimal doping concentration of Eu3+ ions here is confirmed as x=1.5. The electric dipole-quadrupole (D-Q) interaction is deduced to be responsible for concentration quenching of Eu3+ ions in the Li3Ba2Y3(WO4)8 phosphor. The analysis of optical transition and Huang-Rhys factor reveals a weak electron-phonon coupling interaction. The temperature-dependent emission spectra also indicate that the as-prepared Li3Ba2Y3(WO4)8:Eu3+ phosphor has better thermal stability than that of the commercial Y2O2S:Eu3+ phosphor. Therefore, our results show that the as-prepared Li3Ba2Y3(WO4)8:Eu3+ phosphor is a promising candidate as red emitting component for white light emitting diodes (LEDs). |
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| Keywords: | Concentration quenching Optical transition Thermal stability |
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