Investigation of Electrolyte Dependence on Electrochromic Properties of Electrodeposited Fe2O3 Thin Film

Fe2O3 thin film with 300 nm thickness is deposited on FTO substrate using electrodeposition technique. After deposition, samples were annealed at 300°C for 30 min. X ray diffraction (XRD), scanning electron microscopy (SEM), Cyclic voltammetry (CV), choronometry and UV/Vis spectrophotometric analysis were used for studying the structure, morphology, electrochromic and optical properties of synthesized thin films, respectively. Based on our results, α-Fe2O3 nanoparticles with 40 nm size were uniformly distributed on FTO surface thin film. We have used two different electrolytes LiClO4 – PC and LiOH for investigation of electrochromic behavior of thin films. Results showed that this behavior depends on the electrolyte type in the potential range of -1.5 to 1 V.