The thiophene derivative with ferricyanide end group and its polymers: synthesis and electrochromic performance

Abstract

A novel thiophene derivative (Fe-Th) with ferricyanide end group is successfully synthesized. The polythiophene derivative (Fe-PTh) is additionally obtained in aqueous solution by polymerization of Fe-Th, and shows a nanoparticle structure with a diameter from 10 to 100 nm. A simple solid-state electrochromic device is fabricated using the Fe-PTh as electrochromic material, and displays a novel three-color electrochromism from blue, green, and red with the increased potential.

Two New Bithiophenes Derivatives Multielectrochromic Copolymer Based on Triphenylamine Unit and Their Application for Electrochromic Devices

“…Electrochromic (EC) polymers, which can show different colors obtained from the same material at different redox state, have superior coloration efficiency (CE), high optical contrast ratio, high stability, and the ease of band gap control by structure modification to generate various colors . The major conducting polymers used in electrochromism are polyaniline, polypyrrole, polythiophene, and their derivatives. In recent years, EC polymers have found an increasingly wide utilization in automatic antiglazing mirror, “smart windows,” military camouflage, display device, and so on.…”