Upconversion in Er3+-doped Bi2O3-Li2O-BaO-PbO tertiary glass.
Garima Tripathi, Vineet Kumar Rai, D K Rai, S B Rai
Index: Spectrochim. Acta. A. Mol. Biomol. Spectrosc. 66(4-5) , 1307-11, (2007)
Full Text: HTML
Abstract
Radiative properties of Er3+-doped tertiary bismuth glass has been analyzed by the Judd-Ofelt theory. NIR to visible upconversion in the Er3+-doped glass has been reported. The mechanism for the upconversion is explained on the basis of quadratic dependence on excitation power and on the energy-matching scheme. Energy transfer is noted as the dominant process including the long-lived 4I11/2 level as the intermediate state for the green and red upconversion emissions. The effect of temperature on the fluorescence intensity of the two bands due to 2H11/2-->4I15/2 and 4S3/2-->4I15/2 transitions as well as on the transitions due to Stark components of the 4S3/2 level have been monitored and it is concluded that their intensity ratio may serve as better temperature sensing device.
Related Compounds
Related Articles:
2007-03-01
[J. Nanosci. Nanotechnol. 7(3) , 1006-13, (2007)]
2009-01-01
[Dent. Mater. 25(11) , 1411-8, (2009)]
Enhancement of ferroelectric polarization stability by interface engineering.
2012-03-02
[Adv. Mater. 24(9) , 1209-16, (2012)]
Oxygen-17 hyperfine structures in the pure rotational spectra of SrO, SnO, BaO, HfO and ThO.
2007-11-28
[Phys. Chem. Chem. Phys. 9(44) , 5897-901, (2007)]
The near-infrared broadband emission from bismuth-doped GeO2-WO3 and GeO2-BaO glasses.
2008-06-01
[Spectrochim. Acta. A. Mol. Biomol. Spectrosc. 70(1) , 122-5, (2008)]