In this paper, we present a novel and low - cost method for preparing copper
sulfide films on polyamide. Non-treated as well as pre-treated PA6 films by
3 different methods (in boiled water; in NaOH solution; in boiled water and
then in NaOH solution) were used for the formation of Cu2S layers by the
sorption-diffusion method. Molten sulfur has been used as a sulfurization
agent. The XRD, FTIR, and UV-VIS methods were used to characterize the
structural, optical, and electrical properties of samples and to track
changes in samples after each treatment stage. The sheet resistance of Cu2S
layers depends on the pre-treatment method and varied from 7 k?/sq to 6
M?/sq. The optical band gaps (Eg) for direct and indirect transitions are
determined to be 2.61-2.67 eV and 1.40-1.44 eV, respectively. Furthermore,
the optical constants n, k, and ? are determined from UV-VIS measurements.