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

JOURNAL OF ALLOYS AND COMPOUNDS

卷:823

Article

Bourdin, Marie^1,3  Mjejri, Issam¹  Rougier, Aline¹  Labrugere, Christine²  Cardinal, Thierry¹  Messaddeq, Younes³  Gaudon, Manuel¹ 

[1] Univ Bordeaux, CNRS, Bordeaux INP, ICMCB,UMR 5026, F-33600 Pessac, France

[2] Univ Bordeaux, CNRS, PLACAMAT, UMS 3626, F-33600 Pessac, France

[3] Laval Univ, COPL, Dept Phys, Laval, PQ G1V 0A6, Canada

关键词: Polyol synthesis;    Nanocrystalline;    Tungsten oxide;    Electrochromism;   

DOI  :  10.1016/j.jallcom.2020.153690

来源: Elsevier

【 摘 要 】

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. (C) 2020 Elsevier B.V. All rights reserved.

【 授权许可】

Free