Title
White light emission and spectroscopic properties of Dy3+ions doped bismuth sodiumfluoroborate glasses for photonic applications
Author
M. Mariyappan, S. Arunkumar, K. Marimuthu
Year
2017
Journal
Journal of Alloys and Compounds
Abstract
Dy3+ ions doped Bismuth sodium fluoroborate glasses (BiNFBxD) have been prepared following the melt quenching technique and characterized through XRD, FTIR, UV-Vis-NIR absorption, luminescence and decay measurements for developing potential WLEDs and yellow lasers. The local symmetry around the Dy3+ ions in the prepared glasses were investigated through optical basicity, covalent character factor, bonding parameter, Judd-Ofelt parameters and Y/B intensity ratio values. The least squares fitting method have been employed to determine the Judd-Ofelt intensity parameters Ωλ to study the nature of bonding and symmetry orientation of the Dy-ligand field environment and to derive the radiative properties for the various emission transitions of the Dy3+ ions. The higher spectroscopic quality factor Ω4/Ω6 values of the prepared glasses indicate its suitability for the fabrication of laser devices and the values were compared with the reported literature. While exciting the Dy3+ doped title glasses at 452 nm (6H15/2 → 4I15/2), the emission bands 4F9/2 → 6H15/2 (blue), 4F9/2 → 6H13/2 (yellow) and 4F9/2 → 6H11/2 (red) were observed at 482 nm, 575 nm and 679 nm, respectively. The radiative properties like stimulated emission cross-section (σPE
Instrument
FP-8500
Keywords
Fluorescence, Photoluminescence, Optical properties, Coloar analysis, Materials