Investigation of optical, structural properties of Eu3+ by Mn2+ in barium alumino borosilicate glasses

The Mn2+ ions doped Eu2O3-BaO-Al2O3-B2O3-SiO2 glasses are synthesized by conventional melt quenching method. The effect of Mn2+ ions on spectroscopic, structural properties of Eu3+ ions in glass networks is analysed. An analysis of XRD traces evidently suggests the glassy nature of the prepared samples. The UV-Vis absorption and the luminescence spectra have been used to study the variations in the optical character of Eu3+ ions. In luminescence spectra five bands can be observed at about 578, 590, 612, 653 and 702 nm as a result of transitions of Eu3+ ions from D-5(0) -> F-7(0), 1, 2, 3, 4 respectively. By gradual increment of MnO mol% in the glass matrix, the strong variation in the intensity of emission band are observed at about 612 nm (D-5(0) -> F-7(2)). The non-radiative energy transfer (Mn2+ <-> Eu3+) and concentration quenching are observed in the prepared glasses. The ESR spectra exhibit a sixtet hyperfine structure centered at g = similar to 2.0047 which suggests that manganese ions predominantly occupy octahedral positions. (C) 2016 Elsevier B.V. All rights reserved.