Impact of bismuth concentration on the fluorescence properties of the bismuth borosilicate glasses

• Published in: Optical and quantum electronics 2021-07, Vol.53 (7), Article 345
• Main Authors: Al Mahalawy, M., Farouk, H., Ratep, A., Kashif, I.
• Format: Article
• Language: English
• Subjects: Absorption spectra; Bismuth oxides; Bismuth trioxide; Boron oxides; Borosilicate glass; Characterization and Evaluation of Materials; Color; Computer Communication Networks; Electrical Engineering; Emission analysis; Emission spectra; Excitation spectra; Fluorescence; Fourier transforms; Ion concentration; Lasers; Molar volume; Optical Devices; Optics; Photonics; Physical properties; Physics; Physics and Astronomy; Refractivity; Silicon dioxide; Spectral emissivity; Tellurium dioxide
• ISSN: 0306-8919; 1572-817X
• DOI: 10.1007/s11082-021-02966-0

The glass samples with composition (30 SiO 2 -5 TeO 2 -1.0 Dy 2 O 3 -(65-x) B 2 O 3 -xBi 2 O 3 ) where x = 5, 15, 25, 35, 45 and 50 mol% were prepared by melt quenching method. The glassy state was confirmed by the X-ray diffraction. Fourier transformation infrared, physical properties (density, ion concentration, molar volume, Polaron radius, inter-nuclear distance, refractive index, optical bandgap) absorption spectra, excitation, and emission spectra have been analyzed. The absorption spectrum shows five bands with a hypersensitive transition corresponding to 6 H 9/2 (7911 cm −1 ) at 1256 nm. The emission spectra showed two intense emission bands around 480 nm and 575 nm corresponding to the 4 F 9/2  →  6 H 15/2 and 4 F 9/2  →  6 H 13/2 transition. PL intensity decreases with increasing the Bi 2 O 3 content. All values of the fundamental parameters (The color coordinates, Y/B ratio, and color rendering index ( CRI )) are very close to the standard value for the glass samples with high Bi 2 O 3 content.