Abstract
Electrochromic multilayer films consisting of polyoxometalate (POM) cluster K 6[P 2W 18]·14H 2O (P 2W 18), TiO 2 and polyallylamine hydrochloride (PAH) were fabricated on quartz, silicon wafer and ITO substrates by the layer-by-layer self-assembly method. The multilayer films were characterized by UV–vis spectrum, scanning electron microscopy (SEM), cyclic voltammetry (CV) and chronoamperometric (CA) and in situ spectral electrochemical measurements. The interesting feature is that the electrochromic films can increase stability due to the presence of TiO 2. The multilayer films exhibit high optical contrast, suitable response time and low operation potential. TiO 2 is employed to enhance stability of the electrochromic multilayer films based on POMs by the layer-by-layer method, which gives valuable information for exploring new stable electrochromic materials.
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