Electrical conductivity studies in (Ag3AsS3)x(As2S3)1−x superionic glasses and composites

Abstract

Compositional, frequency, and temperature studies of impedance and electrical conductivity in (Ag3AsS3)x(As2S3)1−x superionic glasses and composites were performed. Frequency range from 10 Hz to 3 × 109 Hz and temperature interval 300–400 K were used for the measurements. Compositional dependences of electrical conductivity and activation energy are analyzed; the most substantial changes are observed with the transition from (Ag3AsS3)0.4(As2S3)0.6 glass to (Ag3AsS3)0.5(As2S3)0.5 composite. With increase of Ag3AsS3 content, the investigated materials are found to have crystalline inclusions and show the two-phase composite nature. Addition of Ag3AsS3 leads to the increase of electrical conductivity whereas the activation energy decreases.

Structural and optical studies of (Ag3AsS3)0.6(As2S3)0.4 thin films deposited at different technological conditions

“…Synthesis of (Ag 3 AsS 3 ) 0.6 (As 2 S 3 ) 0.4 composite material (that consists of crystalline Ag 3 AsS 3 and glassy As 2 S 3 [13]) was carried out at a temperature of 700°C for 24 h with subsequent melt homogenization for 72 h. (Ag 3 AsS 3 ) 0.6 (As 2 S 3 ) 0.4 thin films were prepared by rapid thermal evaporation from the corresponding composite material at temperatures 1050, 1200 and 1350°C in vacuum (310 -3 Pa) by using a VU-2M setup. The composite material was initially placed in a tantalum evaporator, perforated for preventing the material falling out, on a glass substrate kept at room temperature.…”

“…By the means of the PLD technique a potentiometric thin film sensor can be realized on the basis of chalcogenide glasses (in particular Ag-As-S) [11]. Recently, we have reported about structure [12], electrical conductivity [13], and optical absorption [14] in superionic Ag 3 AsS 3 -As 2 S 3 glasses and composites. In this paper, we study the deposition technology of (Ag 3 AsS 3 ) 0.6 (As 2 S 3 ) 0.4 thin films and influence of the evaporation temperature on its structural and optical properties which includes scanning electron microscopy (SEM) and atomic force microscopy (AFM) as well as the spectroscopic investigations of transmission and absorption spectra, refractive indices and their dispersion curves due to the change of evaporation temperature.…”

Compositional studies of optical parameters in (Ag3AsS3)x(As2S3)1–x (x = 0.3; 0.6; 0.9) thin films

“…It should be noted that, in comparison with crystalline solid electrolytes, chalcogenide glasses are more technological, simple and lower-cost in production. Recently, we have reported about the structure [3], electrical conductivity [4], and optical absorption [5] in superionic Ag 3 AsS 3 -As 2 S 3 glasses and composites. X-ray studies have manifested the glasses of Ag-As-S system to get separated after adding the proustite Ag 3 AsS 3 crystal to the base As 2 S 3 glass [4].…”

“…Recently, we have reported about the structure [3], electrical conductivity [4], and optical absorption [5] in superionic Ag 3 AsS 3 -As 2 S 3 glasses and composites. X-ray studies have manifested the glasses of Ag-As-S system to get separated after adding the proustite Ag 3 AsS 3 crystal to the base As 2 S 3 glass [4]. It should be noted that one can distinguish three different structural states in the whole compositional range of the (Ag 3 AsS 3 ) x (As 2 S 3 ) 1-x system: glassy state for x = 0…0.4, composite state with crystalline smithite AgAsS 2 inclusions for 0.4 < x ≤ 0.6, and a composite state with crystalline smithite AgAsS 2 and proustite Ag 3 AsS 3 inclusions for 0.6 < x < 1 [6].…”

Temperature studies of optical parameters in (Ag3AsS3)0.6(As2S3)0.4 thin films

“…Recently, we have reported about the structure [3], electrical conductivity [4], and optical absorption [5] in superionic Ag 3 AsS 3 -As 2 S 3 glasses and composites. Thin films in this system, like to many other similar ones, were mostly prepared via deposition onto substrates using vacuum coating techniques, i.e.…”