양극산화된 TiO2 및 WO3 나노구조체로 구성된 광전기변색 소자 제작
Fabrication of Photoelectrochromic Devices Composed of Anodized TiO2 and WO3 Nanostructures
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In this study, we demonstrate the photoelectrochromic devices composed of TiO2 and WO3 nanostructures prepared by anodization method. The morphology and the crystal structure of anodized TiO2 nanotubes and WO3 nanoporous layers are investigated by SEM and XRD. To fabricate a transparent photoelectrode on FTO substrate, a TiO2 nanotube membrane, which has been detached from Ti substrate, is transferred to FTO substrate and annealed at 450°C for 1 hr. The photoelectrode of TiO2 nanotube and the counter electrode of WO3 nanoporous layer are assembled and the inner space is filled with a liquid electrolyte containing 0.5 M LiI and 5 mM I2 as a redox mediator. The properties of the photoelectrochromic devices is investigated and Pt-WO3 electrode system shows better electrochromic performance compared toWO3 electrode.
Abstract
In this study, we demonstrate the photoelectrochromic devices composed of TiO2 and WO3 nanostructures prepared by anodization method. The morphology and the crystal structure of anodized TiO2 nanotubes and WO3 nanoporous layers are investigated by SEM and XRD. To fabricate a transparent photoelectrode on FTO substrate, a TiO2 nanotube membrane, which has been detached from Ti substrate, is transferred to FTO substrate and annealed at 450°C for 1 hr. The photoelectrode of TiO2 nanotube and the counter electrode of WO3 nanoporous layer are assembled and the inner space is filled with a liquid electrolyte containing 0.5 M LiI and 5 mM I2 as a redox mediator. The properties of the photoelectrochromic devices is investigated and Pt-WO3 electrode system shows better electrochromic performance compared toWO3 electrode.
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