Tunable emission from green to red in the GdSr2AlO5:Tb3+,Eu3+ phosphor via efficient energy transfer

被引:43
|
作者
Zhang, Yu [1 ]
Zhang, Xuejie [1 ]
Zhang, Haoran [1 ]
Zheng, Lingling [1 ]
Zeng, Yuan [1 ]
Lin, Yu [1 ]
Liu, Yingliang [1 ]
Lei, Bingfu [1 ]
机构
[1] South China Agr Univ, Coll Mat & Energy, Guangdong Prov Engn Technol Res Ctr Opt Agr, Guangzhou 510642, Guangdong, Peoples R China
基金
中国国家自然科学基金;
关键词
LIGHT-EMITTING-DIODES; WHITE-LIGHT; PHOTOLUMINESCENCE PROPERTIES; LUMINESCENCE PROPERTIES; EU3+; TB3+; EXCITATION; UV; WLEDS; HOST;
D O I
10.1039/c7ra12260h
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Herein, a series of GdSr2AlO5:Tb3+,Eu3+ phosphors were successfully synthesized through a high temperature solid-state reaction, and their crystal structures as well as photoluminescence properties were investigated in detail. Compared to the intense emission of D-5(0) -> F-7(1) or D-5(0) -> F-7(2) transition of Eu3+, another strong emission corresponding to D-5(0) -> F-7(4) was observed. Concentration quenching is not obvious in Tb3+ or Eu3+-doped GdSr2AlO5 because structure isolation and energy transfer (ET) of Gd3+ -> Eu3+ and Gd3+ -> Tb3+ were found. Moreover, the energy transfer process from Tb3+ to Eu3+ was verified by the overlap of luminescence spectra and the variation of lifetime. Energy transfer mechanism was determined to be a dipole-dipole interaction, and ET efficiency as well as quantum efficiency were also obtained. Moreover, the emission color of GdSr2AlO5:Tb3+, Eu3+ can be tuned from green to red by altering the ratio of Tb3+/Eu3+. These results indicate that the GdSr2AlO5:Tb3+,Eu3+ phosphor is a promising single-component white light-emitting phosphor.
引用
收藏
页码:3530 / 3535
页数:6
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