Fabrication of Photoelectrochromic Devices Composed of Anodized TiO2 and WO3 Nanostructures Lee, Sanghoon; Cha, Hyeongcheol; Nah, Yoon-Chae;
In this study, we demonstrate the photoelectrochromic devices composed of and nanostructures prepared by anodization method. The morphology and the crystal structure of anodized nanotubes and nanoporous layers are investigated by SEM and XRD. To fabricate a transparent photoelectrode on FTO substrate, a nanotube membrane, which has been detached from Ti substrate, is transferred to FTO substrate and annealed at for 1 hr. The photoelectrode of nanotube and the counter electrode of nanoporous layer are assembled and the inner space is filled with a liquid electrolyte containing 0.5 M LiI and 5 mM as a redox mediator. The properties of the photoelectrochromic devices is investigated and Pt- electrode system shows better electrochromic performance compared to electrode.