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.

引用

页码：6395 / 6398

页数：3

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