Reddish-orange Ca3?xAl2O6:xEu3+ nanophosphors: Fast synthesis and photophysical properties |
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| Institution: | 1. School of Science and Technology, Federal University of Rio Grande do Norte, Campus Universitário Lagoa Nova, 59078-970 Natal, RN, Brazil;2. Institute of Chemistry, Federal University of Rio Grande do Norte, Campus Universitário Lagoa Nova, 59072-970 Natal, RN, Brazil;3. Department of Fundamental Chemistry, Federal University of Pernambuco, Av. Prof. Moraes Rego, 1235 Cidade Universitária, 50670-901 Recife, PE, Brazil;1. Department of Physics, POSTECH, Pohang, South Korea;2. Pohang Accelerator Laboratory, POSTECH, Pohang, South Korea;3. Advanced Materials Research Lab, Department of Basic & Applied Sciences, Punjabi University, Patiala, Punjab, India;1. Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, China;2. State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Micro-system and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China;1. Physical and Life Sciences, Lawrence Livermore National Laboratory, PO Box 808, L-372, Livermore, CA 94551, United States;2. Computer Science and Mathematics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, United States;3. Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, United States;1. Department of Mechanical Engineering, Tokyo City University, 1-28-1 Tamazutsumi, Setagaya-ku, Tokyo, Japan;2. Advanced Research Laboratory, Tokyo City University, 8-15-1 Todoroki, Setagaya-ku, Tokyo, Japan |
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| Abstract: | This paper focuses on the synthesis and the photoluminescent properties of Ca3?xAl2O6:xEu3+ (0≤x≤0.1) nanophosphors prepared by microwave-assisted combustion method without any further heat treatment. X-ray diffraction, scanning electron microscopy and photoluminescence spectroscopy were used to characterize the produced samples. Nanosized particles smaller than 120 nm were obtained as confirmed by SEM. When exposed to UV light radiation at 254 nm, the europium-doped nanoparticles showed strong reddish-orange luminescence due to the characteristic transitions 5D0→7F1 (orange) and 5D0→7F2, (red). The maximum emission intensity of the visible emission was obtained for x=0.05. It was also found that higher doping concentrations led to the luminescence quenching by a cross-relaxation mechanism between Eu3+ ions in the lattice. |
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| Keywords: | Oxides Optical materials Chemical synthesis X-ray diffraction Luminescence |
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