| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5399859 | Journal of Luminescence | 2014 | 7 Pages |
Abstract
Ultraviolet-visible-near infrared (UV-vis-NIR) absorption and photoluminescence of (25âx) La2O3-25B2O3-50GeO2 glass series have been studied with different concentrations (x=0.1-1.0 wt%) of Sm2O3 as an optically active dopant. The values of Judd-Ofelt (JO) parameters (Ωt) follow the trend Ω2>Ω4>Ω6. Visible emission and decay times from the 4G5/2 level and its relative quantum efficiencies are measured. Intense reddish-orange emission corresponding to 4G5/2â6H7/2 transition has been observed in these glasses under 488 nm excitation. A decrease in the quantum yield is observed with increasing Sm3+ ion concentration beyond 1% doping level.
Keywords
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Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
R. Rajaramakrishna, Brian Knorr, Volkmar Dierolf, R.V. Anavekar, H. Jain,