Journal
JOURNAL OF ELECTROCERAMICS
Volume 17, Issue 2-4, Pages 929-932Publisher
SPRINGER
DOI: 10.1007/s10832-006-0463-3
Keywords
electrochromism; mesoporous; film; viologen; TiO2; ECD; nanoparticle
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The electrochromic properties of the viologenanchored mesoporous TiO2 (Meso-TiO2) films were investigated in this work. The Meso-TiO2 films, synthesized by evaporation-induced self-assembly (EISA) process, deposited on ITO electrodes were a worm-like structure with an average pore diameter of 7.0 nm. The electrochromic devices (ECDs) fabricated from the Meso-TiO2 demonstrated 3 times of coloration efficiency and considerably faster switching response, compared with those from the nanocrystalline films made of the 7 nm-sized TiO2 nanoparticles. The advantage of the Meso-TiO2 would originate from the well-organized mesopore structures, offering an efficient electrolyte transport as well as the fast electron transfer from the ITO electrode to the anchored viologen.
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