Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5400352 | Journal of Luminescence | 2014 | 6 Pages |
Abstract
Glasses having composition of (100âx) (1Bi2O3-1ZnO-1B2O3)-xDy2O3 (where x=0.1, 0.3, 0.5, 1 and 2Â mol%) were prepared by melt quenching method and characterized through optical absorption, emission and decay curve measurements. Optical absorption spectra have been analyzed using Judd-Ofelt theory. Asymmetric ratio, the intensity ratio of yellow to blue transitions, has been calculated from the emission spectra to understand the symmetry around the Dy3+ ions in the glass matrix. The emission spectra have been analyzed in the framework of CIE 1931 chromaticity colour coordinates in order to find out the white light emission characteristics of the glasses. The decay curve measurements exhibit single exponential behaviour up to 1Â mol% of Dy3+ ions whereas non exponential behaviour is observed for 2Â mol% of Dy3+ ions. The non exponential curve has been fitted to the Inokuti-Hirayama model to understand the nature of energy transfer process.
Related Topics
Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
B. Shanmugavelu, V.V. Ravi Kanth Kumar,