LIU Jian,WANG Wu-di,SONG Qing-song,et al.Growth and Luminescence Properties of Tb3+ Ions Doped CaF2 Crystals[J].Chinese Journal of Luminescence,2022,43(11):1750-1757. DOI: 10.37188/CJL.20220229.
LIU Jian,WANG Wu-di,SONG Qing-song,et al.Growth and Luminescence Properties of Tb3+ Ions Doped CaF2 Crystals[J].Chinese Journal of Luminescence,2022,43(11):1750-1757. DOI: 10.37188/CJL.20220229.DOI:
Growth and Luminescence Properties of Tb3+ Ions Doped CaF2 Crystals增强出版
= 0, 3, 5, 10) crystals have been successfully grown by the temperature gradient technique(TGT). The crystal structure was analyzed by X-ray diffraction, and the results showed that the high concentration of rare earth ion doping increased the unit cell parameters, but still maintained the fluorite cubic structure of CaF
2
. The absorption spectra, fluorescence spectra, and fluorescence decay curves were measured and analyzed at room temperature. By co-doping Y
3+
ions, the spectral quality factor
Ω
4
/
Ω
6
increased
from 0.75 to 0.80. Using F-L formula, the emission cross sections of 10%Tb∶CaF
2
were calculated to be 0.89×10
-21
cm
2
and 0.082×10
-21
cm
2
for the 545 nm and 587 nm, respectively, and the emission cross sections of 10% Tb,10%Y∶CaF
2
were calculated to be 0.89×10
-21
cm
2
and 0.077×10
-21
cm
2
for the 545 nm and 587 nm. The fluorescence lifetime of
5
D
4
level is more than 5 ms, and there is no fluorescence lifetime quenching phenomenon caused by high concentration doping. The long fluorescence lifetime means that Tb
3+
ion has excellent energy storage capacity. The experimental results show that Tb∶CaF
2
and Tb,Y∶CaF
2
crystals are gain mediums with great potential to realize visible laser output.
关键词
Keywords
references
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