Sequential Solution Polymerization of Poly(3,4-ethylenedioxythiophene) Using V2O5 as Oxidant for Flexible Touch Sensors

Sequential Solution Polymerization of Poly(3,4-ethylenedioxythiophene) Using V2O5 as Oxidant for Flexible Touch Sensors

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Summary: Various in situ synthesis methods have been developed for the polymerization of 3,4-ethylenedioxythiophene monomers, such as electropolymerization, oxidative chemical vapor deposition, and vapor phase polymerization.Meeting industrial requirements through these techniques has, however, proven challenging.Here, we introduce an alternative method to fabricate highly conductive poly(3,4-ethylenedioxythiophene) (PEDOT) films in situ by solution means.The process involves sequential deposition of oxidants (V2O5 in this case) and monomers.Excess reactants and by-products can be here completely removed from the PEDOT film by MeOH rinsing.

The obtained PEDOT films possess good crystallinity and high doping level, with copyright concentration three orders of magnitude higher than that of the commercial product (PH1000, Heraeus GmbH).The electrical conductivity of the as-cast PEDOT film reaches up to 1,420 S/cm.In addition, this method is fully compatible with large-scale printing techniques.These PEDOT skull bride and groom conducting films enable the realization of flexible touch sensors, which demonstrate superior flexibility and sensitivity.: Chemistry; Polymer Chemistry; Electronic Materials Subject Areas: Chemistry, Polymer Chemistry, Electronic Materials.