Low-Temperature UV-Processing of Nanocrystalline Nanoporous Thin TiO(2) Films: An Original Route toward Plastic Electrochromic Systems

作者：Tebby Zoe; Babot Odile; Toupance Thierry^*; Park Dae Hoon; Campet Guy; Delville Marie Helene

来源：Chemistry of Materials, 2008, 20(23): 7260-7267.

DOI：10.1021/cm802030c

The direct UV irradiation of nanoparticulate TiO(2) films deposited by the "doctor-blade" technique led to 1.1 mu m thick nanoporous and nanocrystalline anatase layers on various kinds of substrates as evidenced by various characterization techniques (MET, SEM, XRD, TGA-MS, and N(2) 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 cm(2) 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 cm(2) 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.

• 出版日期2008-12-9