Synthesis of Sr4Al2O7:Eu2+/Dy3+ phosphors by the solid-state reaction and luminescent properties

被引：0
|
作者：
Zhijian Liu
Sijia Chen
Lingbin Meng
Boxiang Liu
机构：
[1] North China Electric Power University,Department of Power Engineering, School of Energy, Power and Mechanical Engineering
[2] North China Electric Power University,Department of Electrical Engineering, School of Electrical and Electronic Engineering
来源：
Journal of Materials Science: Materials in Electronics | 2015年 / 26卷
关键词：
Luminescent Property; Rare Earth Metal; Luminescent Center; Aluminate Phosphor; High Emission Intensity;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Sr4Al2O7:Eu2+/Dy3+ phosphors are synthesized by the solid-state reaction. The obtained powders are characterized by XRD, SEM and luminescent spectrometer. The effects of the mole ratios of Dy3+/Eu2+ on luminescent properties of Sr4Al2O7:Eu2+/Dy3+ phosphors are investigated. The XRD pattern indicates that the powders have pure Sr4Al2O7 phase. The SEM micrographs reveal that Sr4Al2O7:Eu2+/Dy3+ phosphors show similar irregular morphology. Under the excitation of 360 nm, Sr4Al2O7:Eu2+/Dy3+ phosphors exhibit the characteristic emission band originating from the 4f65d1 → 4f7 transition of Eu2+ ions. The emission intensity increases with the increasing mole ratio of Dy3+/Eu2+ up to 3 and then decreases. Thermalluminescence results indicate that the persistent afterglow of Sr4Al2O7:Eu2+/Dy3+ phosphors is generated by suitable electron traps formed by the Dy3+ ions within the host.
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页码：6395 / 6398
页数：3
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