Probing the photoelectrochemical performance of spray-coated Cu2CoSnS4 thin films on FTO substrate

This research reports the deposition of fluorine-doped tin oxide (FTO) thin films, which were used as conducting electrodes for the deposition of Cu2CoSnS4 (CCTS) thin films, with an indigenously designed spray pyrolysis setup. Both FTO and CCTS thin films have been deposited using the chemical spray pyrolysis method. The CCTS thin films were deposited with a constant quantity of the precursor solution of 80 ml. The deposition temperature was 350 °C for CCTS thin films, and the ratio of cations to anions was 1:7 in the precursor solution. The deposited CCTS thin films were studied using X-ray diffraction, scanning electron microscopy, and Raman spectroscopy. Additionally, the photoactivity study was carried out. It was obtained that the efficiency of photoelectrochemical solar cells fabricated with a thiourea concentration of 1:7 for cations is 2.33%.