Green colouring electrochromic devices of water-soluble polythiophene

Abstract

The authors report on the electrochromic (EC) behaviour of the environmentally friendly water-soluble polythiophene sodium poly (2-(3-thienyl) ethoxy-4-butylsulfonate) (PTEBS) solid-state devices. Films are fabricated on indium tin oxide substrates and are composed of bilayers of PTEBS and poly (allylamine hydrochloride) using the ionic self-assembled multilayer approach. The self-assembled films showed high stability and demonstrated EC switching from orange to green with a contrast of 61% and colouration efficiency of −238 cm 2 /C in 0•1 M NaClO 4 (aq) at 735 nm. 80-bilayer solidstate devices have an optical contrast of 38% at 735 nm, and 1-cm 2 active area devices show fast t 90% switching times of 125 ms for coloration and 225 ms for decoloration with applied voltage of 2 V for long-term switching of more than 50,000 cycles. Green colouring electrochromic devices of water-soluble polythiophene Jain, Yochum, Montazami and Heflin ICE Publishing: All rights reserved

Editorial: alternative energy systems: materials for nanofluids, electrochromics, photocatalysis, and thermoelectrics

“…The growth study demonstrates that, along with temperature and time of reaction, the reduction rate, conjugate anion of the starting reagent and the reaction atmosphere can influence the formation of thermoelectric materials. The article by Jain et al 3 reports electrochromic behavior of a water-soluble polythiophene-based thin film device. The device demonstrates high stability and electrochromic switching from orange to green with high efficiency and fast switching times.…”