SHI Dong-mei, ZHAO Ying-gang,. Spectroscopic Properties and Energy Transfer of Tm<sup>3+</sup>/Er<sup>3+</sup>/Yb<sup>3+</sup>-doped Ga<sub>2</sub>O<sub>3</sub>-GeO<sub>2</sub> Glass[J]. Chinese Journal of Luminescence, 2017,38(1): 50-56
SHI Dong-mei, ZHAO Ying-gang,. Spectroscopic Properties and Energy Transfer of Tm<sup>3+</sup>/Er<sup>3+</sup>/Yb<sup>3+</sup>-doped Ga<sub>2</sub>O<sub>3</sub>-GeO<sub>2</sub> Glass[J]. Chinese Journal of Luminescence, 2017,38(1): 50-56 DOI: 10.3788/fgxb20173801.0050.
Spectroscopic Properties and Energy Transfer of Tm3+/Er3+/Yb3+-doped Ga2O3-GeO2 Glass
were prepared by melting quenching method. The effects of Tm
2
O
3
contents on the visible and infrared spectra of the samples under 808 and 980 nm excitation were compared. The mechanisms of energy transfer between Tm
3+
Er
3+
and Yb
3+
ions were analyzed combining with the energy level of rare earth ions. The results show that the obvious blue (473 nm)
red (655 nm)
green (521 and 544 nm) emission can be observed in Tm
3+
/Er
3+
/Yb
3+
-codoped sample. I
1.8
/I
1.53
(intensity ratio of Tm
3+
:1 800 nm and Er
3+
:1 530 nm) are enhanced and the red and green upconversion emission intensities under the excitation of 808 nm are adjusted due to the efficient energy transfer between Er
3+
and Tm
3+
with the increase of Tm
3+
concentration. Correspondently
the emission intensity of 473
521 and 655 nm show a trend of firstly increasing and then decreasing
and achieve the maximum value when the mole fraction of Tm
2
O
3
is up to 0.3%. The upconversion red
green and blue emission intensity under 980 nm excitation is higher than that of 808 nm because of the sensitizing effect of Yb
3+
to Er
3+
and Tm
3+
.
关键词
Keywords
references
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