Behavior of bismuth ions in the two glassy systems of 50 LiF-50 P2O5 and 50 LiF-50 B2O3 (mol %) assessed by optical, FTIR and photoluminescence spectra in addition to thermal expansion properties

• Published in: Optical and quantum electronics Vol. 55; no. 3
• Main Authors: ElBatal, F. H., Marzouk, M. A., ElBatal, H. A., Hamdy, Y. M.
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.03.2023; Springer Nature B.V
• Subjects: Bismuth oxides; Bismuth trioxide; Boron oxides; Characterization and Evaluation of Materials; Computer Communication Networks; Electrical Engineering; Lasers; Optical Devices; Optical properties; Optics; Phosphorus pentoxide; Photoluminescence; Photonics; Physics; Physics and Astronomy; Spectra; Thermal expansion; Bismuth; Fluoroborate; FTIR; Fluorophosphate; Glass; Photoluminescence
• ISSN: 0306-8919; 1572-817X
• DOI: 10.1007/s11082-022-04475-0

Glasses from two varieties of (LiF-B 2 O 3 ) and (LiF-P 2 O 5 ) systems with equal 50 mol % for each partner together with samples doped with 1 or 2% Bi 2 O 3 were synthesized by melting–annealing mechanism. Multiple optical, FTIR and photoluminescence spectral measurements were carried out. Optical spectra of Bi 2 O 3 —doped glasses exhibit UV-near visible peaks owing to the specific absorption of Bi 3+ ions. FTIR spectra elucidate the presence of characteristic vibrational bands from (LiF-B 2 O 3 ) glass due to (BO 3 ) and (BO 3 F) groups beside (LiF 4 ) groups while the fluorophosphate glasses (LiF-P 2 O 5 ) show vibrations due to PO 4 and (PO 3 F) groups and also the possible sharing of (LiF 4 ) groups. Photoluminescence spectral data reveal extended emission from about 375 to 700 nm and is more prominent in (LiF-B 2 O 3 ) system than (LiF-P 2 O 5 ) system. The thermal expansion data reveal similar behavior and the derived transition and softening temperatures are slightly lower in (LiF-P 2 O 5 ) glasses than (LiF-B 2 O 3 ) glasses.