Fluorescence line narrowing spectral studies of Eu(3)(+)--doped lead borate glass

• Published in: Journal of non-crystalline solids Vol. 351; no. 10-11; pp. 929 - 935
• Main Authors: Venkatramu, V, Navarro-Urrios, D, Babu, P, Jayasankar, C K, Lavin, V
• Format: Journal Article
• Language: English
• Published: 15.04.2005
• ISSN: 0022-3093
• DOI: 10.1016/j.jnoncrysol.2005.02.010

A lead borate glass of molar composition 49*5H3BO3--49*5PbO--1*0Eu2O3 was prepared and studied by broadband and fluorescence line narrowing spectral techniques. Site--selective (5)D0-- > (7)F0,1 emission spectra were obtained under resonant excitation at different wavelengths along the(7)F0-- > (5)D0 transition. These studies have been used to investigate the site--to--site variations in the spectroscopic properties of Eu(3)(+)ions in the lead borate glass at 13K. The energies of the Stark levels of the(7)F1 multiplets are obtained from the experimental fluorescence line narrowing spectra and crystal--field analysis has been carried out, assuming C2v orthorhombic symmetry, for each of the excitation energies. The distribution environments and the local structures of Eu(3)(+)ions in lead borate glass are found to be almost similar to calcium diborate glass and lies intermediate between Eu(3)(+)--doped sodium borosilicate and lithium fluoroborate glasses.