Electrosynthesis and characterization of a donor-acceptor type electrochromic material from poly(4,7-dicarbazol-9-yl-2,1,3-benzothiadia-zole) and its application in electrochromic devices

► A donor-acceptor carbazole based monomer and its polymer were synthesized. ► The polymer film showed good electrochromic properties and high optical contrast. ► An electrochromic device based on the polymer was also constructed and characterized.