Combustion synthesis and photoluminescence of SrAl2O4:Eu,Dy phosphor nanoparticles |
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| Affiliation: | 1. Department of Chemistry, Wuhan University, Wuhan 430072, PR China;2. State Key Laboratory of Rare Earth Materials Chemistry and Application, Peking University, Beijing, PR China;1. Department of Applied Chemistry and Biochemical Engineering, Graduate school of Engineering, Shizuoka University, 3-5-1, Johoku, Naka-ku, Hamamatsu, Shizuoka, Japan;2. Murata Manufacturing Co., Ltd., Nagaokakyo-shi, Japan;1. School of Mathematics and Physics, Changzhou University, Jiangsu 213164, China;2. School of Electronics and Information, Nantong University, Jiangsu 226019, China;1. Department of Physics and Electronics, Rhodes University, PO Box 94, Grahamstown 6140, South Africa;2. Department of Physics, Meru University of Science and Technology, PO Box 972-60200, Meru, Kenya;3. Department of Physics and Electronics, University of St Andrews, Scotland, United Kingdom |
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| Abstract: | Eu2+,Dy3+ co-doped strontium aluminate (SrAl2O4) phosphor nanoparticles with high brightness and long afterglow were prepared by glycine–nitrate solution combustion synthesis at 500 °C, followed by heating the resultant combustion ash at 1100 °C in a weak reductive atmosphere of active carbon. The average particle size of the SrAl2O4:Eu,Dy phosphor nanoparticles ranges from 15 to 45 nm as indicated by transmission electron microscopy (TEM). The broad-band UV-excited luminescence of the SrAl2O4:Eu,Dy phosphor nanoparticles was observed at λmax=513 nm due to transitions from the 4f65d1 to the 4f7 configuration of the Eu2+ ion. The results indicated that the main peaks in the emission and excitation spectrum of phosphor nanoparticles shifted to the short wavelength compared with the phosphor obtained by the solid-state reaction synthesis method. The decay speed of the afterglow for phosphor nanoparticles was faster than that obtained by the solid-state reaction method. |
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