Ion clustering in YAG:Ce, Yb near-infrared down-conversion phosphors

被引：0
|
作者：
Tang L. [1 ,2 ,3 ]
Ye H. [1 ,2 ]
Xiao D. [1 ,2 ]
机构：
[1] National Astronomical Observatories, Nanjing Institute of Astronomical Optics & Technology, Chinese Academy of Sciences, Nanjing
[2] CAS Key Laboratory of Astronomical Optics & Technology, Nanjing Institute of Astronomical Optics & Technology, Nanjing
[3] University of Chinese Academy of Sciences, Beijing
来源：
Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering | 2019年 / 48卷 / 05期
关键词：
Ion clustering; Luminescent material; Sol-gel method; Solid-state reaction; YAG:; Ce; Yb phosphor;
D O I：
10.3788/IRLA201948.0521004
中图分类号：
学科分类号：
摘要：
457 nm and 915 nm continuous lasers were used to study the Yb3+ near-infrared luminescence and up-conversion energy transfer mechanisms in YAG: Ce, Yb phosphors synthesized via solid-state reaction and sol-gel method. Under either excitation, sol-gel samples demonstrated the same Yb3+ nearinfrared luminescence quenching concentration of-5%, with similar trends. In solid-state reaction samples, 915 nm excitation yielded a quenching concentration of-5%, while 457 nm excitation resulted in a quenching concentration of 10%, indicating a less homogeneous distribution of dopant ions. Visible upconversion luminescence from Yb3+-impurity ion and Yb3+-Yb3+ ion pairs can be observed. Solid-state reaction samples demonstrate stronger cooperative luminescence from Yb3+-Yb3+ ion pairs. The results show that clustering of Yb3+ ions is more significant in samples synthesized via solid-state reaction, which could lower the near-infrared down-conversion efficiency of this type of material. © 2019, Editorial Board of Journal of Infrared and Laser Engineering. All right reserved.
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