1.
Spectrochim Acta A Mol Biomol Spectrosc
; 118: 966-71, 2014 Jan 24.
Artigo
em Inglês
| MEDLINE
| ID: mdl-24161859
RESUMO
This paper reports on the effect of concentration of Eu(3+) ions in K2O-Nb2O5-SiO2-Eu2O3 (KNbSiEu) glasses prepared by the melt quenching technique. By using the Judd-Ofelt (JO) theory, the intensity parameters Ωλ (λ=2, 4, 6) have been determined from the absorption and emission spectra of Eu(3+) ions under different constraints. The radiative properties of some of the excited states of Eu(3+) ions have been calculated. The decay curves of (5)D0 level exhibited single exponential for all the Eu(3+) ions concentrations. From these results, it is suggested that the strong red emission at 616 nm corresponding to the (5)D0â(7)F2 transition could be used for the development of optical display devices.