Quenching cooperative transitions by destroying Yb3+-clusters

被引：3

作者：

Guo, Junjie ^{[1
]}

Aidilibike, Tuerxun ^{[1
,2
]}

Di, Weihua ^{[1
]}

Li, Yangyang ^{[1
]}

Liu, Xiaohui ^{[1
]}

Qin, Weiping ^{[1
]}

机构：

[1] Jilin Univ, Coll Elect Sci & Engn, State Key Lab Integrated Optoelect, Changchun 130012, Jilin, Peoples R China

[2] Yili Normal Univ, Elect & Informat Engn, Yining 835000, Xinjiang, Peoples R China

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2017年 / 19卷 / 20期

基金：

中国国家自然科学基金;

关键词：

ENERGY-TRANSFER; UP-CONVERSION; LUMINESCENCE; CRYSTALS; SOLIDS; PAIRS; IONS;

D O I：

10.1039/c7cp01678f

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In our previous study, we have reported the cooperative luminescence of Yb3+-trimers and cooperatively sensitized Gd3+ luminescence by Yb3+- tetramers in a doped CaF2 host. In this study, we experimentally observed an unusual luminescent phenomenon of Gd3+ in CaF2: Yb3+/Gd3+. Upon excitation with a 980 nm laser, the upconversion luminescence of Gd3+ first increases and then decreases in the Gd3+ concentration range of 0-0.9 mol%; this is different from the monotonic increase of Gd3+ luminescence observed in the downconversion spectra via the direct excitation of Gd3+. This special luminescent behavior was indicated to be related to the energy transfer from the Yb3+- tetramers to Gd3+ and the destruction of Yb3+- clusters. Herein, we proposed a new luminescence quenching mechanism, Yb3+-cluster destructive quenching, which was verified by fluorescence dynamic analysis and an optically inactive rare-earth ion-doping experiment.

引用

页码：12637 / 12641

页数：5

共 20 条

[11] CLUSTER FORMATION OF ION-DEFECT PAIRS IN COMPENSATED LATTICES [J].