Preparation and Electrochromic Performance of TiO2 Thin Film

Abstract

TiO2 films were prepared by sol–gel methods with butyltitanate as main raw materials. Structural and electrochromic properties were investigated by XRD, SEM, electrochemical workstation and Ultraviolet visible spectroscopy. The results indicate that the TiO2 films have better electrochromic properties when the films are amorphous with heat treatment temperature at 250°C and applied voltage of ± 2V with respect to the reference electrode. And injected charge density is at 5.13 mC·cm-2,cyclic reversibility K value is at 0.48, transmittance is below 60% and the difference of transmittance between colored state and bleached state is 20%.