Long persistent luminescence and traps distribution of Tb3+ doped calcium gallium germanate

被引：28
|
作者：
Wang, Ziqi [1 ]
Wei, Zhiting [1 ]
Li, Na [1 ]
Zhang, Pengfei [1 ]
Zhang, Gangtai [1 ]
Zhao, Lei [1 ,2 ]
机构：
[1] Baoji Univ Arts & Sci, Collaborat Innovat Ctr Rare Earth Opt Funct Mat &, Baoji 721016, Shaanxi, Peoples R China
[2] Baoji Adv Titanium Alloys & Funct Coatings Cooper, Baoji 721016, Shaanxi, Peoples R China
来源：
JOURNAL OF LUMINESCENCE | 2020年 / 228卷
基金：
中国国家自然科学基金;
关键词：
Ca2Ga2GeO7:Tb3+; Green LPL; Traps; RED-EMITTING PHOSPHORS; ENERGY-TRANSFER; EU2+ PHOSPHOR; PHOTOLUMINESCENCE; FLUX; EU3+;
D O I：
10.1016/j.jlumin.2020.117638
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A new type of long persistent green luminescent phosphor Ca2Ga2GeO7: Tb3+ was prepared by high temperature solid-state reaction technique. In this paper, the crystal structure, luminescence properties and decay curves of phosphors were mainly studied. The long persistent luminescence (LPL) properties of these phosphors were characterized by LPL spectra, LPL decay curves and thermoluminescence (TL) spectra. When the ultraviolet (UV) light source was turned off, Ca2Ga2GeO7: Tb3+ phosphor exhibit typical LPL behavior for approximately 1.2 h. The green-emitting LPL was originated form the typical D-5(4) -> F-7(5) transition of Tb3+ ions, and the green LPL is similar to PL. Based on the experimental results, the LPL mechanism and traps distribution of the Ca2Ga2GeO7: Tb3+ was described via TL analysis in detail.
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页数：7
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