Sr3Bi(PO4)3:Eu2+, Mn2+: Single-phase and color-tunable phosphors for white-light LEDs |
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| Affiliation: | 1. College of Information Science and Engineering, Hebei North University, Zhangjiakou 075000, China;2. Department of Electrical Engineering, Zhangjiakou Vocational and Technical College, Zhangjiakou 075000, China;1. Institute of Physics, ASCR, v.v.i., Cukrovarnická 10, 162 53 Prague, Czech Republic;2. Physics Department, Clarkson University, Potsdam, NY 13699-5820, United States;3. Czech Technical University, FNSPE, Břehová 7, 115 19 Prague, Czech Republic;4. Charles University, Faculty of Math. and Physics, Ke Karlovu 5, 121 16 Prague, Czech Republic;1. Helmholtz Zentrum Berlin fur Materialien and Energie GmbH, Hahn-Meitner-Platz 1, D-14109 Berlin, Germany;2. Universidad Autonoma de Madrid, Departamento de Fısica Aplicada, C/ Francisco Tomas y Valiente 7, 28049 Madrid, Spain;3. Institute of Applied Physics, Academy of Sciences of Moldova, Academiei Str. 5, MD-2028 Chişinău, Moldova;4. Department of Chemistry, Belarusian State University of Informatics and Radioelectronics, Minsk, Belarus;1. School of Physics and Electronic Engineering, Fuyang Teachers College, Fuyang, Anhui 236037, China;2. School of Chemical and Chemical Engineering, Fuyang Teachers College, Fuyang, Anhui 236037, China;1. Instituto de Química, Universidade de São Paulo, São Paulo, SP, Brazil;2. Department of Chemistry, University of Turku, Turku, Finland;3. Departamento de Química, Pontifícia Universidade Católica do Rio de Janeiro, Rio de Janeiro, RJ, Brazil;4. Centro de Química e Meio Ambiente, Instituto de Pesquisas Energéticas e Nucleares, São Paulo, SP, Brazil;5. Turku University Centre for Materials and Surfaces (MatSurf), Turku, Finland;6. Departamento de Química Fundamental, Universidade Federal de Pernambuco, Recife, PE, Brazil |
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| Abstract: | Sr3Bi(PO4)3:Eu2+, Sr3Bi(PO4)3:Mn2+, and Sr3Bi(PO4)3:Eu2+, Mn2+ phosphors were synthesized by solid state reaction. The structure and luminescent characteristics were investigated by X-ray powder diffraction and fluorescent spectrophotometer. All samples have the structural type of eulytine. The excitation and emission spectra of Sr3Bi(PO4)3:0.01Eu2+ sample show characteristic bands of Eu2+ ions. Also, the excitation and emission spectra of Sr3Bi(PO4)3:0.06Mn2+ sample show characteristic bands of Mn2+ ions. The emission color of Sr3Bi(PO4)3:Eu2+, Mn2+ sample could be tuned through tuning the co-dopant concentration of Mn2+ ions. The decay times for the Eu2+ ions decrease with the increase of Mn2+ dopant concentration, but the energy transfer efficiency increases with the increase of Mn2+ dopant concentration. On the basis of the luminescent spectra and fluorescence decay curves, we confirm that the energy transfer process from the Eu2+ to Mn2+ ions takes place in the co-doped Sr3Bi(PO4)3 phosphor. Sr3Bi(PO4)3:Eu2+, Mn2+ sample shows the good thermostability. The emission intensity of the sample at 400 K is about 60% of the value at 300 K. These results show Sr3Bi(PO4)3:Eu2+, Mn2+ phosphors could be anticipated for UV-pumped white-light-emitting diodes. |
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| Keywords: | Solid state reaction Phosphors Luminescence |
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