Processing and characterization of new oxysulfide glasses in the Ge–Ga–As–S–O system

• Published in: Journal of solid state chemistry Vol. 181; no. 10; pp. 2869 - 2876
• Main Authors: Maurel, C., Petit, L., Dussauze, M., Kamitsos, E.I., Couzi, M., Cardinal, T., Miller, A.C., Jain, H., Richardson, K.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier Inc 2008; Elsevier
• Subjects: ARSENIC SULFIDES; Chemical Sciences; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; GALLIUM COMPOUNDS; GERMANIUM OXIDES; GLASS; Glasses (including metallic glasses); INFRARED SPECTRA; INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; Material chemistry; Materials science; MELTING; Oxysulfide; OXYSULFIDES; Physics; Raman and IR spectroscopies; Specific materials; X-RAY PHOTOELECTRON SPECTROSCOPY; XPS; Raman and IR spectroscopies; XPS; Oxysulfide; Raman spectra; Infrared spectroscopy; Gallium arsenides; Gallium; Melting; Germanium oxide; Material processing; Arsenic; Raman spectroscopy; Indium arsenides; Nonstoichiometry; Chalcogenide glasses; Structural unit; Germanium; Sulfur; Vitreous state; Bonding; X-ray photoelectron spectra
• ISSN: 0022-4596; 1095-726X
• DOI: 10.1016/j.jssc.2008.07.019

New oxysulfide glasses have been prepared in the Ge–Ga–As system employing a two-step melting process which involves the processing of the chalcogenide glass (ChG) and its subsequent melting with amorphous GeO 2 powder. Optical characterization of the synthesized oxysulfide glasses has shown that the cut-off wavelength decreases with increasing oxygen content, and this has been correlated to results of Raman and infrared (IR) spectroscopies which show the formation of new oxysulfide structural units. X-ray photoelectron spectroscopy (XPS) analysis to probe the bonding environment of oxygen atoms in the oxysulfide glass network, has revealed the preferred formation of Ga–O and Ge–O bonds in comparison to As–O bonds. This work has demonstrated that melting a ChG glass with GeO 2 leads to the formation of new oxysulfide glassy materials. In this paper, we explain how new oxysulfide glasses are prepared in the Ge–Ga–As system employing a two-step process: (1) the processing of the chalcogenide glass (ChG) and (2) the re-melting of the ChG with GeO 2 powder. Raman, infrared and XPS spectroscopies show the formation of new oxysulfide structural units.