Hydrothermal synthesis and up-conversion luminescence of Ho3+/Yb3+ co-doped CaF2

被引：5
作者：
Yang Zheng [1 ]
Guo Chong-Feng [1 ]
Chen Ye-Qing [2 ]
Li Lin [1 ]
Li Ting [1 ]
Jeong Jung-Hyun [2 ]
机构：
[1] NW Univ Xian, Inst Photon & Photon Technol, Natl Key Lab Photoelect Technol & Funct Mat Cultu, Xian 710069, Peoples R China
[2] Pukyong Natl Univ, Dept Phys, Pusan 608737, South Korea
来源：
CHINESE PHYSICS B | 2014年 / 23卷 / 06期
基金：
中国国家自然科学基金;
关键词：
CaF2; nano-particles; up-conversion; hydrothermal synthesis; ENERGY-TRANSFER; YB3+; FLUORESCENCE; GREEN; EUF3; SIZE;
D O I：
10.1088/1674-1056/23/6/064212
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
CaF2:Ho3+/Yb3+ nano-particles with intense green up-conversion (UC) luminescence are successfully synthesized via a facile hydrothermal approach by using NH4F as the fluoride source and Na2EDTA as a chelating reagent. Powder X-ray diffraction (XRD), transmission electron microscopy (TEM), field emission scanning electron microscopy (FE-SEM), and UC emission spectra are used to characterize the structures, shapes, and luminescent properties of the samples. The effects from fluoride sources and chelating reagents on the formations of CaF2 nano-particles are investigated, and the formation process is also deduced. Under the excitation of a 980-nm laser diode, the samples each show a green up-conversion emission centered at 540 nm corresponding to the S-5(2)/F-5(4) -> I-5(8) transitions of Ho3+. Moreover, the UC mechanisms of Ho3+/Yb3+ co-doped CaF2 nano-particles are also discussed.
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页数：7
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