TEBBY, Zoë; BABOT, Odile; TOUPANCE, Thierry; PARK, Dae-Hoon; CAMPET, Guy; DELVILLE, Marie-Hélène

doi:10.1021/cm802030c

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TEBBY, Zoë
Institut des Sciences Moléculaires [ISM]

BABOT, Odile
Institut des Sciences Moléculaires [ISM]

TOUPANCE, Thierry
Institut des Sciences Moléculaires [ISM]

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Chemistry of Materials. 2008, vol. 20, n° 23, p. 7260-7267

American Chemical Society

Résumé en anglais

The direct UV irradiation of nanoparticulate TiO2 films deposited by the “doctor-blade” technique led to 1.1 μm thick nanoporous and nanocrystalline anatase layers on various kinds of substrates as evidenced by various characterization techniques (MET, SEM, XRD, TGA-MS, and N2 sorption measurements). These films demonstrated high electrochromic responses and coloration efficiencies in an ionic liquid containing a lithium salt, which is a stable and environmental friendly electrolyte. The coloration efficiency reached 38 cm2 C−1 for films on ITO/plastic, for a 0.65 absorption change at 710 nm, whereas the corresponding film on FTO/glass showed a 40 cm2 C−1 coloration efficiency for a 1.1 absorbance change at 710 nm. The high surface area, nanoporous texture, and nanoparticulate structure of these layers provide a large number of intercalation sites, and minimal diffusion path lengths are ensured by the high surface-to-volume ratio.< Réduire

Mots clés en portugais

Titanium dioxides

UV irradiation

Nanocrystal

Nanoporous

MET

SEM

XRD

TGA-MS

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Low-temperature UV-processing of nanocrystalline nanoporous thin TiO2 films : an original route toward plastic electrochromic sytems

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