Abstract
A strong dithiafulvenyl (DTF)-substitued triphenylamine (TPA) hybrid electron donor was introduced to N-position of carbazole (CBZ) successfully to synthesize the dithiafulvenyl-triphenylamine-di(N-carbazole) (DTF-TPA-DCBZ) monomer, then its polymer film (poly(DTF-TPA-DCBZ)) was deposited on ITO coated glass substrate by electrochemical polymerization through cyclic voltammetry. Spectroelectrochemical and electrochromic properties of the polymer film were measured through some commonly used methods: cyclic voltammetry, colorimetry, chronoamperometry, ultraviolet-visible and electrochemical impedance spectroscopy analysis. The deposited poly(DTF-TPA-DCBZ) is a multi-color electrochromic film, which has color changing from light yellow to green to blue grey reversibly when different voltages were applied. The polymer film has a broad absorption band at around 650nm in the visible region, its coloring response time is 4s and bleaching response time is 8s. Coloration efficiency of the polymer film is 23.77cm2C−1, meanwhile maximum optical contrast of the polymer film reaches to 40% at the wavelength of 658nm.
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