Effect of calcination temperature on morphology and properties of white long-lasting phosphor Y2O2S:Tb3+, Sr2+, Zr4+

被引：0
作者：
机构：
[1] College of Physics and Optoelectronics, Taiyuan University of Technology
[2] Observation and Control Technology Research Institute, Taiyuan University of Technology
来源：
Cui, C. (tytgcejy@sina.com) | 1600年 / Chinese Ceramic Society卷 / 41期
关键词：
Rare earths; Solid state reaction method; White-light long-lasting phosphor; Yttrium oxysulfide;
D O I：
10.7521/j.issn.0454-5648.2013.06.10
中图分类号：
学科分类号：
摘要：
The white-light long-lasting phosphor of Y2O2S:Tb3+, Sr2+, Zr4+ was prepared by a solid state reaction method. The effect of calcination temperature on the phase, surface morphology and luminescent properties of the samples was investigated. The samples were characterized by X-ray diffractometer, scanning electron microscope, fluorescence spectrophotometer, illuminometer and thermally stimulated spectrometer, respectively. The results show that the samples are composed of Y2O2S and Y2O3 phases, in which Y2O3 is a major phase at the calcination temperature of 950°C. The pure Y2O2S phase was obtained at 1000 and 1050°C. Y2O3 phase appeared at > 1050°C. The position and shape of Tb3+ emission peaks under the 288 nm excitation appeared similar for all the samples. The blue light emission at 417 nm and the yellowish-green light emission at 544 nm originated from the 5D3→7F5 and the 5D4→7F5 transitions of Tb3+, respectively. The trap depth was 0.64 eV and the decay time was 160 s (≥1 mcd/m2) for the sample synthesized at 1000°C.
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页码：776 / 781
页数：5
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