Mutual effects of Ag doping and non-stoichiometric glass forming units on the structural, thermal, and electrical properties of Ag30+xAs28-xSe21Te21 chalcogenide glasses

High-Conductivity Chalcogenide Glasses in Ag–Ga2Te3–SnTe Systems and Their Suitability as Thermoelectric Materials

“…As displayed in Figure , the glass transition temperature T g decreased monotonically throughout the measured composition range as the amount of Ag doping increased, indicating a weaker structural rigidity. The analogous experimental characteristics were also observed for Ag x (Ge 5 Sb 25 Se 70 ) 1– x and Ag 30+ x As 28– x Se 21 Te 21 glass systems . The addition of Ag atoms probably disrupted the cross-linking correlation of the network structure, as indicated by its action as a modifier in the Ge 5 Sb 25 Se 70 and AsSe­(Te) 2/3 glass topological networks …”

“…The analogous experimental characteristics were also observed for Ag x (Ge 5 Sb 25 Se 70 ) 1−x and Ag 30+x As 28−x Se 21 Te 21 glass systems. 33 The addition of Ag atoms probably disrupted the cross-linking correlation of the network structure, as indicated by its action as a modifier in the Ge 5 Sb 25 Se 70 and AsSe(Te) 2/3 glass topological networks. 34 The Dietzel stability criterion ΔT = T c − T g is widely employed to analyze the thermal stability of amorphous materials.…”

“…Room-temperature electrical conductivity (σ) as a function of glass transition temperature ( T g ) for Ag–Ga 2 Te 3 –SnTe glasses and typical tellurium-based glasses (refs − , − , − ). The doping concentration is between 5–20% (A) and 5 −35% (B).…”

Thermal Annealing-Induced Transformation of Structural, Morphological, Linear, and Nonlinear Optical Parameters of Quaternary As20Ag10Te10Se60 Thin Films for Optical Applications

“…The mixed quaternary chalcogenide materials are now in demand for their various applications. Zheng et al investigated the sensitivity of Ag 30+ x As 28– x Se 21 Te 21 alloys to the abundant doping of Ag in the composition and found a higher conductivity, ∼5.20 × 10 –6 S cm –1 due to the presence of Ag . Zheng et al formed the BiSe 3– x Te x pyramid structure upon addition of Te to the Bi 5 As 35 Se 60– x Te x system that found numerous applications as a ceramic material .…”

“…Zheng et al investigated the sensitivity of Ag 30+x As 28−x Se 21 Te 21 alloys to the abundant doping of Ag in the composition and found a higher conductivity, ∼5.20 × 10 −6 S cm −1 due to the presence of Ag. 16 Zheng et al formed the BiSe 3−x Te x pyramid structure upon addition of Te to the Bi 5 As 35 Se 60−x Te x system that found numerous applications as a ceramic material. 17 A compositional dependence study of thermally evaporated Ag 60−x Se 40 Te x thin films shows an increase in nonlinear optical values with a decrease in the bandgap upon incorporation of Te.…”