Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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Fabrication of Photoelectrochromic Devices Composed of Anodized TiO2 and WO3 Nanostructures

양극산화된 TiO2 및 WO3 나노구조체로 구성된 광전기변색 소자 제작

  • Lee, Sanghoon (School of Energy, Materials, and Chemical Engineering, Korea University of Technology and Education) ;
  • Cha, Hyeongcheol (School of Energy, Materials, and Chemical Engineering, Korea University of Technology and Education) ;
  • Nah, Yoon-Chae (School of Energy, Materials, and Chemical Engineering, Korea University of Technology and Education)
  • 이상훈 (한국기술교육대학교 에너지신소재화학공학부) ;
  • 차형철 (한국기술교육대학교 에너지신소재화학공학부) ;
  • 나윤채 (한국기술교육대학교 에너지신소재화학공학부)
  • Received : 2015.10.11
  • Accepted : 2015.10.20
  • Published : 2015.10.28
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Abstract

In this study, we demonstrate the photoelectrochromic devices composed of $TiO_2$ and $WO_3$ nanostructures prepared by anodization method. The morphology and the crystal structure of anodized $TiO_2$ nanotubes and $WO_3$ nanoporous layers are investigated by SEM and XRD. To fabricate a transparent photoelectrode on FTO substrate, a $TiO_2$ nanotube membrane, which has been detached from Ti substrate, is transferred to FTO substrate and annealed at $450^{\circ}C$ for 1 hr. The photoelectrode of $TiO_2$ nanotube and the counter electrode of $WO_3$ nanoporous layer are assembled and the inner space is filled with a liquid electrolyte containing 0.5 M LiI and 5 mM $I_2$ as a redox mediator. The properties of the photoelectrochromic devices is investigated and Pt-$WO_3$ electrode system shows better electrochromic performance compared to $WO_3$ electrode.

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