Preparation and characterization of spray- deposited efficient Prussian blue electrochromic thin film

We used a homemade spray pyrolysis technique described below to prepare Prussian blue (PB) electrochromic (EC) thin films as a new approach, that will facilitate the doping process of Prussian blue by another salt to alter its electrochromic properties. It can be deposited on conductive and nonconductive substrates, which is difficult by electrodeposition method. To evaluate the new approach we prepared a sample with electrodeposition technique (EDS) with the same procedures as literature to make a comparison with spray pyrolysis sample (SPS). The optical, structure, morphology and electrochemical properties of these films were studied by UV-vis ray diffraction (XRD), scanning electron microscopy (SEM), cyclic voltammetry(CV) and chronoamperometry traces (CA), respectively. The measurements reveal that SPS has more stability, excellent reversibility, and homogeneity during cycling than EDS. The coloration efficiency (η) of SPS was 124.3 cm2/C while it was 47 cm2/C for EDS prepared from the same precursor materials and on the same substrate.