Luminescent performance of Ca2SnO4:Tb3+ phosphors with Li+ co-doping

被引：22
|
作者：
Ma, Junfeng [1 ]
Chen, Yulin [1 ]
Wang, Xun [1 ]
Cao, Shanqiao [1 ]
Chen, Qi [1 ]
机构：
[1] North China Elect Power Univ, Sch Renewable Energy, Beijing 102206, Peoples R China
来源：
OPTICAL MATERIALS | 2018年 / 85卷
关键词：
Phosphors; Solid state reaction; Point defects; Luminescence; X-ray diffraction; R+ LI+; PHOTOLUMINESCENCE; EMISSION; ENHANCEMENT; NA+; NANOCRYSTALS; MECHANISM; IONS; YB3+; CE;
D O I：
10.1016/j.optmat.2018.08.036
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Long afterglow phosphors Ca2SnO4:Tb3+, Li+ with a green light were successfully synthesized by solid-state reaction, and their phase composition and luminescent property also studied using X-ray powder diffraction (XRD), photoluminescence (PL) and afterglow decay measurement. The results show that adding a small amount of Li+ ions does not have a significant effect on the crystal structure of Ca2SnO4:Tb3+, and that Ca2SnO4:Tb3+, Li+ samples are single phase of solid solutions. Their luminescent properties are strongly dependent on Li+ doping modes. The distortion of host lattice and change of the local crystal field symmetry around Tb3+ enhanced their emission intensity, while the formation of oxygen vacancy and the suitable depth traps improved their afterglow performance; but the association of interstitial Li+ (Li-i) with Ca2+ vacancy (V ''(ca)), and excessive Li+ ions would worsen their phosphorescence. Their afterglow mechanism was proposed.
引用
收藏
页码：86 / 90
页数：5
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