Effects of Host Doping on Spectral and Long-Lasting Properties of Sm3+ -Doped Y2O2S
来源期刊：JOURNAL OF RARE EARTHS2006年第5期
论文作者：Yao Kang Zhang Ludan Liu Shixiang Li Wenjun Wang Mingwen
Key words：yttrium oxysulfide; long-lasting properties; host doping; rare earths;
Abstract: Gd- or Lu-doped long afterglow red phosphor Y2O2S:Sm3+ was synthesized using the high temperature flux fusion method. The obtained phosphors were analyzed using X-ray diffraction to determine the crystal structure, and the phase analyses show that the product is in single phase. The luminescence spectra and decay curve were measured on a Hitachi F-4500 fluorescence spectrophotometer. The decay time was determined on an ST-900PM weak light photometer.The analyses show that host doping of Lu improves both luminescence and decay time of the materials. The concentration of doped Lu and Sm was varied in order to determine the optimal condition and to synthesize the product with the best properties. The mechanism of the long afterglow was also briefly discussed.
Yao Kang1，Zhang Ludan1，Liu Shixiang1，Li Wenjun1，Wang Mingwen1
(1.Department of Applied Chemistry, College of Science and Applied Science, University of Science and Technology Beijing, Beijing 100083, China)
Abstract:Gd- or Lu-doped long afterglow red phosphor Y2O2S:Sm3+ was synthesized using the high temperature flux fusion method. The obtained phosphors were analyzed using X-ray diffraction to determine the crystal structure, and the phase analyses show that the product is in single phase. The luminescence spectra and decay curve were measured on a Hitachi F-4500 fluorescence spectrophotometer. The decay time was determined on an ST-900PM weak light photometer.The analyses show that host doping of Lu improves both luminescence and decay time of the materials. The concentration of doped Lu and Sm was varied in order to determine the optimal condition and to synthesize the product with the best properties. The mechanism of the long afterglow was also briefly discussed.
Key words:yttrium oxysulfide; long-lasting properties; host doping; rare earths;
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