Dynamic Coloration Properties of Spin-coated WO3 Thin Films

Abstract

Abstract: WO₃ thin films were fabricated on ITO glass substrates by the spin-coating technique using H₂WO₄ and H₂O₂ as precursors. The films annealed at 150℃ for 1h show dynamic coloration and bleaching efficiencies of 10.0,
8.6 cm²/C respectively at 633nm during cycling between --1 and +1V (vs. SCE) in LiClO₄/PC at the scan rate of 20mV/s. The films annealed at 350℃ show improved cycling stability while losing some efficiency.
The films annealed at 150℃　have also been electrochemically cycled by a constant current charge injection, which is found to be more easy to control
the amount of charge injected into the films, and avoid overcharging the films, especially the surface layer.

Key words: WO₃, electrochromism, optical properties, cyclic voltammetry, sol-gel

CLC Number:

O484

WANG Zhong-Chun,HU Xing-Fang. Dynamic Coloration Properties of Spin-coated WO₃ Thin Films[J]. Journal of Inorganic Materials.

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Dynamic Coloration Properties of Spin-coated WO₃ Thin Films

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