La3GaGe5O16:Cr3+ phosphor: the near-infrared persistent luminescence

被引：20
|
作者：
Zhang, Shaoan [1 ]
Hu, Yihua [1 ]
Chen, Li [1 ]
Fu, Yinrong [1 ]
Ju, Guifang [1 ]
机构：
[1] Guangdong Univ Technol, Sch Phys & Optoelect Engn, Waihuan Xi Rd 100, Guangzhou 510006, Guangdong, Peoples R China
来源：
OPTICAL MATERIALS EXPRESS | 2016年 / 6卷 / 04期
基金：
中国国家自然科学基金;
关键词：
UP-CONVERSION; YB3+; CR3+;
D O I：
10.1364/OME.6.001247
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Long persistent phosphors in the near-infrared (NIR) region have attracted much attention due to the potential application in in vivo imaging. La3GaGe5O16:Cr3+ phosphor presents a NIR long persistent luminescence after the short UV-irradiation. La3GaGe5O16 host also exhibits a cyan persistent luminescence. The optimal concentration of Cr3+ in La3GaGe5O16 is experimentally about 0.01 and the afterglow time can last more than 30 min. The estimated trap depth which varies continuously as a function of delay time is evidence for the presence of a continuous trap distribution. In order to improve the performance of afterglow luminescence of the La3GaGe5O16:Cr3+, we modified composition around Cr3+ by adjusting the Ge/O content. La3GaGe5O16:Cr3+ is shown to be a new near-infrared persistent phosphor potentially suitable for in vivo imaging due to its 650nm-750nm emission range. (C) 2016 Optical Society of America
引用
收藏
页码：1247 / 1255
页数：9
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