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

• Published in: Journal of molecular structure Vol. 1125; pp. 136 - 143
• Main Authors: Lakshmi, P. Vijaya, Rao, T.G.V.M., Neeraja, K., Krishna Reddy, D.V., Rami Reddy, M.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 05.12.2016
• Subjects: ESR; Eu3+ ions; Luminescence; Mn2+ ions; UV–Vis absorption; Mn2+ ions; UV–Vis absorption; ESR; Eu3+ ions; Luminescence
• ISSN: 0022-2860; 1872-8014
• DOI: 10.1016/j.molstruc.2016.06.064

The Mn2+ ions doped Eu2O3BaOAl2O3B2O3SiO2 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 5D0→7F0, 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 (5D0→7F2). 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 = ∼2.0047 which suggests that manganese ions predominantly occupy octahedral positions. •UV–Vis and ESR spectra confirm Mn2+ oxidation state.•Mn2+ enhances the emission bands of Eu3+ ions.•Glass network connectivity becomes rigid (BOSi bonds) at high MnO.•These samples are suited for intensive red emission in the series.