Electrochromic response of WO3 and WO3-TiO2 thin films prepared from water-soluble precursors and a block copolymer template

Electrochromic tungsten trioxide (WO3) thin films are attracting renewed attention as transmittance-controllable windows for use in automobile, aircraft, and building applications. In order to achieve high electrochromic performance, high cycle stability, and high reliability, the microstructure and...

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Bibliographic Details
Published inJournal of Asian Ceramic Societies Vol. 4; no. 4; pp. 367 - 370
Main Authors Kuroki, Takashi, Matsushima, Yuta, Unuma, Hidero
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.12.2016
Taylor & Francis Group
Subjects
Electrochromism
Titanium oxide
Tungsten oxide
Titanium oxide
Tungsten oxide
Electrochromism
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Summary:Electrochromic tungsten trioxide (WO3) thin films are attracting renewed attention as transmittance-controllable windows for use in automobile, aircraft, and building applications. In order to achieve high electrochromic performance, high cycle stability, and high reliability, the microstructure and compositional homogeneity of WO3 thin films have to be optimized. In this study, non-doped WO3 and TiO2-doped WO3 thin films were fabricated from water-soluble precursors of tungsten and titanium, and their electrochromic response was investigated. Amorphous WO3 and TiO2-doped WO3 thin films were fabricated by calcining the spin-coated films at 573K. The use of a PEO-PPO-PEO block copolymer as a porogen facilitated the redox reactions occurring on the thin film/electrolyte interface. Although the effect of TiO2-doping on the cycle stability of WO3 thin films has not been fully elucidated, this study demonstrated that TiO2 doping up to 15mol% effectively enhanced the cycle stability.
ISSN:2187-0764
2187-0764
DOI:10.1016/j.jascer.2016.07.003