The first truly all-polymer electrochromic devices

Using poly(3,4-ethylenedioxythiophene)-poly (styrene sulfonate) (PEDOT-PSS) as the transparent electrode material, all-polymer-based electrochromic devices (ECDs) have been constructed from only organic and polymeric components. In the picture shown, an absorption/transmissive-type ECD maintained in its colored state is bent to demonstrate its flexibility.