Structural Properties of Ag-As-S Chalcogenide Glasses

In this work we focus on the influence of Ag doping (10, 15 wt.%) on structural and optical properties of AS
₂
S
₃
glasses using XRD technique, Raman and FTIR spectroscopy. X-ray diffraction studies confirmed amorphous structure of glasses. Radial distribution functions have been obtained and analyzed, and have testified about certain increase of the first coordination sphere radius after introduction of silver into As
₂
S
₃
. Changes of the structure can be observed from obtained Raman spectra of doped As
₂
S
₃
: Ag. Raman data show that studied chalcogenides are nanostructurized materials. Compositional changes in studied glasses result in the evolution of the observed Raman bands. Such dependences of characteristic constituent Raman bands' intensities showed that Ge-As-S samples contain different nanophases whose concentration is changing along chosen compositional cross-section. Analysis of FTIR transmission spectra of studied chalcogenide glasses shows the changes of optical properties.