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

Abstract

Abstract. (Ag 3 AsS 3 ) 0.6 (As 2 S 3 ) 0.4 thin films were deposited onto a silica substrate by using rapid thermal evaporation. The surfaces of the films were covered with Ag-rich crystalline micrometer-sized cones. The optical transmission spectra of thin films were studied within the temperature range 77…300 K. The absorption spectra in the region of its exponential behaviour were analysed, the dispersion dependences of refractive index as well as the temperature dependences of energy position of absorption edge and Urbach energy were investigated.

Temperature studies of optical absorption in the sandwich structure based on (Ag3AsS3)0.6(As2S3)0.4 thin film and gold nanoparticles

“…The coordinates of the Urbach bundle convergence point α 0 and E 0 for the sandwich structure as well as for (Ag 3 AsS 3 ) 0.6 (As 2 S 3 ) 0.4 thin film are given in Table. Temperature behaviour of the Urbach absorption edge in the sandwich structure, similarly to (Ag 3 AsS 3 ) 0.6 (As 2 S 3 ) 0.4 thin film [13,14], is explained by electron-phonon interaction (EPI). The EPI parameters are obtained from the temperature dependence of absorption edge steepness parameter (Fig.…”

“…4) that the optical absorption edge spectra in the range of their exponential behaviour in the sandwich structure, similarly to (Ag 3 AsS 3 ) 0.6 (As 2 S 3 ) 0.4 thin film [13,14], are described by the Urbach rule [20]:…”

“…[13,14]. A typical Urbach bundle was observed, temperature dependences of the energy pseudogap and Urbach energy were obtained.…”

Deposition and optical absorption studies of Cu–As–S thin films

“…[8], we have presented the results of deposition of (Ag 3 AsS 3 ) 0.6 (As 2 S 3 ) 0.4 thin films by using rapid thermal evaporation. Typical Urbach behaviour of optical absorption edge is observed for (Ag 3 AsS 3 ) 0.6 (As 2 S 3 ) 0.4 thin film [9,10]. Analysis of compositional dependences of the Urbach absorption edge parameters for (Ag 3 AsS 3 ) x (As 2 S 3 ) 1-x (x = 0.3, 0.6, 0.9) thin films was performed in [11].…”

Photo-induced effects in (Ag3AsS3)0.6(As2S3)0.4 thin films and multilayers with gold nanoparticles

“…Therefore, it is now of a certain interest to study such effects in the Ag-As-S thin films obtained by two [13][14][15] and PLD [16] have been already investigated by our group. Surface patterning on As(Ge)-S(Se) amorphous chalcogenide nanomultilayers obtained using the latter two methods was investigated recently [8].…”