Room Temperature UV treated WO3 thin films for electrochromic devices on paper substrate

Abdelaadim Danine (1) , L. Cojocaru (2) , Cyril Faure (1) , Céline Olivier (2) , Thierry Toupance (2) , Guy Campet (1) , Aline Rougier (1)

1 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux
2 ISM - Institut des Sciences Moléculaires

Successful preparation of tungsten oxide thin films on paper substrate, using a novel room temperature deposition method involving the connection of tungsten oxide nanoparticles by UV-irradiation, is reported. WO3 thin films, prepared from synthesized monoclinic WO3 powder as compared to commercial ones, show higher electrochemical activity and good cycling stability in 0.3 M trifluoromethanesulfonimide (HTFSI) in 1-butyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide (BMITFSI) ionic liquid electrolyte versus Pt as counter electrode. Electrochromic performances of complete devices using Prussian Blue (PB) as complementary counter electrode and 0.3 M Lithium Bis(Trifluoromethanesulfonyl)Imide LiTFSI in BMITFSI plastified with polymethylmetacrylate (PMMA) membrane electrolyte are associated with a contrast in reflectance of 13%, from a yellow to a blue color.

Mots clés: WO3; UV-treatment; Room temperature deposition; Substrate paper; Electrochromic properties; Devices

Domaines: Matériaux

Abdelaadim Danine, L. Cojocaru, Cyril Faure, Céline Olivier, Thierry Toupance, et al.. Room Temperature UV treated WO3 thin films for electrochromic devices on paper substrate. Electrochimica Acta, 2014, 129, pp.113-119. ⟨10.1016/j.electacta.2014.02.028⟩. ⟨hal-00988852⟩