BOURDIN, Marie; MJEJRI, Issam; ROUGIER, Aline; LABRUGÈRE, Christine; CARDINAL, Thierry; MESSADDEQ, Younès; GAUDON, Manuel

doi:10.1016/j.jallcom.2020.153690

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BOURDIN, Marie
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
Centre d'Optique, Photonique et Laser [COPL]

MJEJRI, Issam
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

ROUGIER, Aline
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

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Journal of Alloys and Compounds. 2020-05, vol. 823, p. 153690 (10 p.)

Elsevier

Résumé en anglais

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.< Réduire

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Nanocrystalline

Electrochromism

Polyol Synthesis

Tungsten Oxide

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

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