JIA Yu-jie, LIN Jian, ZHANG Wen-jun etc. Effect of Fluoride on Up-conversion and Infrared Luminescence Properties of Er<sup>3+</sup>/Yb<sup>3+</sup> Co-doped Tellurite Glass[J]. Chinese Journal of Luminescence, 2014,35(3): 287-292
JIA Yu-jie, LIN Jian, ZHANG Wen-jun etc. Effect of Fluoride on Up-conversion and Infrared Luminescence Properties of Er<sup>3+</sup>/Yb<sup>3+</sup> Co-doped Tellurite Glass[J]. Chinese Journal of Luminescence, 2014,35(3): 287-292 DOI: 10.3788/fgxb20143503.0287.
Effect of Fluoride on Up-conversion and Infrared Luminescence Properties of Er3+/Yb3+ Co-doped Tellurite Glass
Erbium (Ⅲ)/ytterbium (Ⅲ)-codoped tellurite glass has been widely studied due to its good quality of up-conversion emission. In this work
fluoride was introduced in the tellurite glass and a series of glasses 70TeO
2
-(30-
x
)ZnO-
x
ZnF
2
-0.15Er
2
O
3
-1.5Yb
2
O
3
(
x
=0
5
10
15
20
molar ratio) were prepared
via
melting process. The thermal stabilities were tested by DTA-TG
and the Raman spectra and stimulated emission spectra were obtained. The results show that the up-conversion luminescence of 410
555
670 nm and mid-infrared emission in the range of 2~3 m are enhanced with the increasing fluoride content
and the red light at 670 nm get more greatly enhanced. We analyzed the intrinsic impact mechanism of fluoride ions on the up-conversion and infrared luminescence and drew the following conclusions: fluoride in tellurite glass could promote the two-photon absorption process of erbium ions
thereby promoting the particles transition to appropriate high-energy level; on the other hand
the maximum phonon density of glass decreased with the introduction of fluoride
which reduced non-radiative transition probabilities and thus improved the conversion and mid-infrared emission intensity.
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references
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