Nano-particles (NPs) of WO3-type compounds by polyol route with enhanced electrochromic properties - Archive ouverte HAL Access content directly
Journal Articles Journal of Alloys and Compounds Year : 2020

Nano-particles (NPs) of WO3-type compounds by polyol route with enhanced electrochromic properties

Abstract

Tungsten trioxide, synthetized as nanoparticles (NPs), then shaped as thin or thick films, has attracted considerable attention as a typical electrochromic material. Herein, the synthesis of WO3 nanoparticles by the polyol process followed or not by heat-treatments under air or argon, has allowed us to compare the electrochromic activity of powders with different morphologies and oxygen-deficiencies. Only the finest particles associated with pseudo-cubic structure due to a large oxygen-deficiency - on the contrary to the larger particles with standard monoclinic structure and W/O stoichiometric ratio - lead to films showing intense electrochromic color change from a whitish (bleached state) to a dark blue (colored state). Additionally, the as-prepared films exhibit quite fast electrochromic performance and satisfying cycling stability. The sub-stoichiometric nanoparticles prepared from polyol synthesis are of great potential for electrochromic applications.
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Dates and versions

hal-02490026 , version 1 (05-05-2020)

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Marie Bourdin, Issam Mjejri, Aline Rougier, Christine Labrugère, Thierry Cardinal, et al.. Nano-particles (NPs) of WO3-type compounds by polyol route with enhanced electrochromic properties. Journal of Alloys and Compounds, 2020, 823, 153690 (10 p.). ⟨10.1016/j.jallcom.2020.153690⟩. ⟨hal-02490026⟩
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