Anomalous emission of Yb2+in CaF2:Tb3+, Yb3+up-conversion phosphor

被引：1
|
作者：
Yagoub, M. Y. A. [1 ]
Swart, H. C. [1 ]
Coetsee, E. [1 ]
机构：
[1] Univ Free State, Dept Phys, POB 9300, ZA-9300 Bloemfontein, South Africa
来源：
PHYSICA B-CONDENSED MATTER | 2023年 / 669卷
基金：
新加坡国家研究基金会;
关键词：
Yb 2+anomalous emission; Up-conversion; Tb 3+emission; Li plus ion charge compensator; UP-CONVERSION LUMINESCENCE; DOWN-CONVERSION; ENERGY-TRANSFER; YB3+ IONS; NANOCRYSTALS; NA+; PHOTOLUMINESCENCE; EXCITATION; TB3+-YB3+; TB3+;
D O I：
10.1016/j.physb.2023.415298
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Anomalous emission of ytterbium (Yb2+) was observed in terbium (Tb3+)-Yb co-doped CaF2 up-conversion nanophosphor. The anomalous emission of Yb2+ is a phenomenon observed, where the Yb2+ ion emits light with a longer wavelength than expected. This phenomenon has attracted significant attention due to its potential applications in a range of fields, including optical communication, sensing and imaging. In this study the presence of Yb2+ ions was confirmed by X-ray photoelectron spectroscopy. The existence of the anomalous emission of Yb2+ in CaF2:Tb3+-Yb significantly influenced the blue emission of the Tb3+ ions due to the upconversion process. The addition of lithium ions as charge compensators into the system decreased the anomalous emission of the Yb2+ ions. Therefore, understanding the mechanism of this anomalous emission of Yb2+ ions in CaF2:Tb3+-Yb and other materials with enhanced emission properties could have significant technological applications.
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页数：6
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