Preparation and characterization of germanium oxy-sulfide GeS2–GeO2 glasses

The structure and optical properties of GeO2–GeS2 glasses

“…The atomic compositions are not investigated, which causes some ambiguity in the measured properties. It is also known that GeS 2 glass is relatively difficult to produce, as exemplified in substantially-scattered glass-transition temperatures of 400-500°C in previous reports [6][7][8]. Accordingly, preparation-reproducibility of GeO 2 -GeS 2 glasses should be examined.…”

“…Recently, Kim et al have reported glass preparation and characterization in the GeO 2 -GeS 2 system [6]. From Raman-scattering spectra and other experiments, Kim et al suggest that the glasses are composed of homogeneous mixtures of GeO n S 4Àn (n = 0-4) tetrahedral units.…”

Dual Effects of Photo-Darkening and Photo-Bleaching in Ge-Se Films

“…Although there are some speculations that both elements Ge and Se could oxidize, following our experience [15], we believe that the only element that could form oxides in the system should be Ge. We have not observed vibrations of Ge-O bonds at 520-650 cm -1 [30], and believe that this process presumably should be excluded from the explanation of the studied phenomena. The annealing contributes to structural and optical changes similar to those characteristics for the PB process, such as the blue shift of the optical band gap.…”

Oxygen‐assisted photoinduced structural transformation in amorphous Ge–S films

“…One other method to determine the structures containing oxygen could be Raman spectroscopy, but since the Raman intensity of the GeO 2 peaks is about 10 times weaker than that of GeS 2 [25] the breathing modes of GeO 2 remain undetected. At the time of this study, we did not have a chance to conduct infrared studies, which would be the most informative method as regards the presence of Ge-O bonds.…”