Growth studies and characterization of In2S3 films prepared by hydrothermal method and their conversion to In2O3 films

► In2S3 films were fabricated on FTO substrate by a hydrothermal method. ► The growth mechanism was proposed by investigating the reaction times. ► Morphology can influence their optical and photoelectrochemical properties. ► In2O3 films were obtained by annealing the In2S3 precursor films.