Structural development in Ge-rich Ge–S glasses

Abstract

This is an author-produced, peer-reviewed version of this article. AbstractThe Raman spectra of Ge-S glasses in the Ge-rich region from Ge 33 to 46 % have been investigated in order to know the structural development of the network glasses. From the detailed curve fits, we have found that there is an unassigned peak at 410 cm -1 and it becomes larger with increasing Ge composition. To clarify the structural origin of the peak, we virtually constructed the atomic arrangement of the glassy state starting from the crystalline state through the liquid state and changed the composition gradually depleting the medium in sulfur. From the consideration of the structural modeling and the atomic orbital theory, we suggest that single Ge-S chain is a probable structural origin of the peak.

Non‐linear optical properties and structure of wide band gap non‐crystalline semiconductors

“…So the broad band around 250 cm -1 having shoulders at 211, 220 and 270 cm -1 is formed probably by overlapping valence vibration bands of minority-type SGe 3 -S 6/3 and Ge 2 S 6/2 nanoclusters. This conclusion is in good agreement with earlier structural interpretation of vibrational spectra of Gecontaining sulphide glasses [18][19][20][21][22][23]. For compositions with x> 0.4 another three bands appear in the Raman spectra of (As 2 S 3 ) x (GeS 2 ) 1-х glasses at 342, 375 and 435 cm -1 (Fig.…”

Composite Sulfur Electrode for All-solid-state Lithium–sulfur Battery with Li₂S–GeS₂–P₂S₅-based Thio-LISICON Solid Electrolyte

“…30,31 This additional peak was not observed in the individually milled SE. Thus, the byproduct with a novel structural unit is likely formed by a reaction of the materials during milling.…”

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

“…In the spectrum of bulk Ge 40 S 60 , the broad peak in the range from 190 to 310 cm −1 is composed of the peak at 220 cm −1 and the peak at 255 cm −1 . These peaks are attributed to the vibration of the double-layer units and the vibration of the ethane-like units, respectively [23]. The broad peak in the range from 320 to 450 cm −1 is composed of the peaks at 340, 370 and 410 cm −1 .…”

“…The peaks at 340 and 370 cm −1 are attributed to the vibrational modes of the ethane-like units [24]. The peak at 410 cm −1 is assigned to the stretching mode of single Ge-S chains, which are made by the failure in forming a double-layer structure [23].…”