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Chemical Bath Deposition of SnS Thin Films from the Solutions with Different Concentrations of Tin and Sulphur

The aim of the current research was to study regularities of chemical bath deposition (CBD) of tin sulphide thin films as function of tin and sulphur concentrations in the solutions. SnS thin films were deposited onto Mo-, ITO-and TO-coated glass and onto borosilicate glass substrates at room temperature for 24 hours. The concentrations of sulphur and tin (ratio 1:1) in the deposition solution were varied from 0.01 M to 0.09 M. Films were characterized by SEM and Raman spectroscopy. The structuraly best tin mono-sulphide films with good adhesion to the substrate were deposited at concentration of consituents in solution 0.03M. The films deposited at concentration of 0.01M had non-uniform and incomplete coverage of the surface on all used substrates whereas at tin and sulphur concentrations of 0.05M and higher films were peeling off of the substrate.