Preparation and electrochromic properties of MoO3/WO3 composite film

MoO3/WO3 composite films with different MoO3 deposition cycles were prepared to use conductive glass as the substrate by combining hydrothermal method and electrochemical deposition method. Electrochromic reversibility, optical density(ΔOD), coloration efficiency, stability and responding time of MoO3/WO3 composite film were obtained by electrochomical measurement technologies and spectral tests. The results show that the MoO3/WO3 composite film with 8 MoO3 electrodeposited cycles has the best electrochromic performance compared with single WO3 nanorod film or MoO3 film, and the electrochromic reversibility is 62.19%, the optical density is 0.61, the coloration efficiency is 153.16 cm2/C, the coloring and bleaching responding time is 8.37 s and 4.77 s, respectively. It the meanwhile, it has a narrower band gap and higher cyclic stability.