CuIn(Se,S)2 Thin Films Synthesis and Characterization from a Single-Bath Electrodeposition Method

The manner in which CuIn(Se,S)2 thin films were synthesized using a one-step electrodeposition method from an electrolyte bath is described. These were deposited on fluorine-doped tin oxide-coated glass substrates. Cyclic voltammetry was used to assess the deposition process. The films were post-annealed in a vacuum atmosphere at 300°C for 1 h. The characterization techniques used in this study were x-ray diffraction, x-ray fluorescence, scanning electron microscopy, atomic force microscopy and UV–visible absorption spectroscopy. The characterization results show that the films have a good morphology, good crystalline structure, a high absorption coefficient close to the band edge, and bandgap energy of 1.44 eV. These properties are suitable for quality solar cell applications.