Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5441920 | Materials Research Bulletin | 2017 | 46 Pages |
Abstract
Potassium-fluoro-phosphate (KFP) glasses singly doped with different concentrations of samarium (0.1, 0.3, 0.5, 1.0, 1.5 and 2.0 mol%) and co-doped with Tb3+(0.1, 0.5, 1.0 mol%) were prepared, and their luminescence properties were investigated. Optical transition properties of Sm3+ ions were evaluated by using Judd-Ofelt theory. Various emission properties were studied from luminescence spectra. Reddish-orange emission of Sm3+ exhibits mainly by 4G5/2 level to 6H7/2 located at 600Â nm. Concentration quenching and energy transfer were observed from fluorescence spectra and decay curves respectively. The non-exponential decay profiles were analyzed Inokuti-Hirayama model (I-H). From this model, various energy transfer kinetic parameters were also calculated and analyzed. By co-doping with Tb3+, energy transfer from Tb3+ to Sm3+ takes place and contributes to enhancement in emission intensity and intense reddish-orange emission was obtained. The optimized properties of the Tb3+/Sm3+ co-doped KFP glasses indicate that these glasses can be used as luminescent materials.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
K. Anil Kumar, S. Babu, V. Reddy Prasad, S. Damodaraiah, Y.C. Ratnakaram,