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

被引：5
|
作者：
Liu, Zhijian [1 ]
Chen, Sijia [2 ]
Meng, Lingbin [1 ]
Liu, Boxiang [1 ]
机构：
[1] North China Elect Power Univ, Sch Energy Power & Mech Engn, Dept Power Engn, Baoding 071003, Peoples R China
[2] North China Elect Power Univ, Sch Elect & Elect Engn, Dept Elect Engn, Baoding 071003, Peoples R China
来源：
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS | 2015年 / 26卷 / 09期
关键词：
COMBUSTION SYNTHESIS; SRAL2O4 EU2+; DY3+; MECHANISM; SR3AL2O6; POWDERS; SR; BA;
D O I：
10.1007/s10854-015-3228-4
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
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 4f(6)5d(1) -> 4f(7) 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
收藏
页码：6395 / 6398
页数：4
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