Green colouring electrochromic devices of water-soluble polythiophene. Issue 6 (November 2014)

• Record Type: Journal Article
• Authors: Jain, Vaibhav; Yochum, Hank M.; Montazami, Reza; Heflin, James R.
• Is Part Of: Nanomaterials and energy. Volume 3:Issue 6(2014)
• Page Start: 215
• Page End: 221
• Publication Date: 2014-11
• Subjects: devices -- ionic self-assembled multilayer (ISAM) -- layer-by-layer (LbL) -- nanoscale -- optical properties -- thin films; Nanostructured materials -- Periodicals; Nanostructures -- Periodicals; 620.115
• DOI: 10.1680/nme.14.00010
• Languages: English
• ISSNs: 2045-9831

Abstract

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 NaClO4 (aq) at 735 nm. 80-bilayer solid-state devices have an optical contrast of 38% at 735 nm, and 1-cm 2 active area devices show fast t90% 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.