A novel electrochromic polymer containing triphenylamine derivative and pyrrole

[Display omitted] ► PDPTPA film possesses six various colors from brown to blue. ► PDPTPA film has fast switching time (1.3 s at 410 nm, 1.4 s at 852 nm and 0.6 s at 617 nm). ► PDPTPA film shows high optical contrast (41% at 852 nm, 52% at 617 nm). ► PDPTPA film exhibits excellent stability. A novel conducting polymer was successfully synthesized via electropolymerization of N 1,N 4-bis(4-(1H-pyrrol-1-yl)phenyl)-N 1,N 4-diphenylbenzene-1,4-diamine (DPTPA). This polymer film exhibited six various colors under different potentials. Besides, this polymer film showed high optical contrast (41% at 852 nm, 52% at 617 nm) and fast switching time (1.3 s at 410 nm, 1.4 s at 852 nm and 0.6 s at 617 nm). Cyclic voltammogram and electro-optical study showed that the polymer film has a stable and well-defined reversible redox process as well as electrochromic behavior.