Electrical and Optical Properties of Cu2Zn(Fe,Mn)SnS4 Films Prepared by Spray Pyrolysis

• Published in: Technical physics 2018-02, Vol.63 (2), p.243-249
• Main Authors: Orletskii, I. G., Mar’yanchuk, P. D., Solovan, M. N., Maistruk, E. V., Kozyarskii, D. P.
• Format: Article
• Language: English
• Subjects: Absorptivity; Classical and Continuum Physics; Conductivity; Crystallites; Electrical resistivity; Energy consumption; Grain boundaries; Iron chlorides; Manganese; Optical properties; Optics; Physics; Physics and Astronomy; Spray pyrolysis
• ISSN: 1063-7842; 1090-6525
• DOI: 10.1134/S1063784218020238

We have analyzed the electrical and optical properties of Cu 2 ZnSnS 4 , Cu 2 FeSnS 4 , and Cu 2 MnSnS 4 films with the p-type electrical conductivity, which were prepared by spray pyrolysis at temperature TS = 290°C using 0.1 M aqueous solutions of salts CuCl 2 · 2H 2 O, ZnCl 2 · 2H 2 O, MnCl 2 · 2H 2 O, FeCl 3 · 6H 2 O, SnCl 4 · 5H 2 O, and (NH 2 )CS. The energy parameters have been determined from analyzing the electrophysical properties of the films using the model of energy barriers at grain boundaries in polycrystalline materials, and the thickness of intercrystallite boundaries has been estimated. The extent of the influence of the hole concentration p 0 in the bulk of crystallites and height E b of the energy barriers between grains on the electrical conductivity has been determined. The optical bandgap width for thin Cu 2 Zn(Fe,Mn)SnS 4 films has been calculated based on analyzing the spectral dependences of the absorption coefficient.