title: Ultrahigh electrical conductivity in solution-sheared polymeric transparent films.
abstract: With consumer electronics transitioning toward flexible products, there is a growing need for high-performance, mechanically robust, and inexpensive transparent conductors (TCs) for optoelectronic device integration. Herein, we report the scalable fabrication of highly conductive poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (
  PSS) thin films via solution shearing. Specific control over deposition conditions allows for tunable phase separation and preferential PEDOT backbone alignment, resulting in record-high electrical conductivities of 4,600 ± 100 S/cm while maintaining high optical transparency. High-performance solution-sheared TC PEDOT:PSS films were used as patterned electrodes in capacitive touch sensors and organic photovoltaics to demonstrate practical viability in optoelectronic applications.
authors.affiliation: Department of Chemical Engineering, Stanford University, Stanford, CA 94305; Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, CA 94025;
authors.forename: Brian J
authors.initials: BJ
authors.lastname: Worfolk
authors.affiliation: Department of Chemical Engineering, Stanford University, Stanford, CA 94305; Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, CA 94025;
authors.forename: Sean C
authors.initials: SC
authors.lastname: Andrews
authors.affiliation: Department of Materials Science & Engineering, Stanford University, Stanford, CA 94305;
authors.forename: Steve
authors.initials: S
authors.lastname: Park
authors.affiliation: Department of Chemical Engineering, Stanford University, Stanford, CA 94305; Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, CA 94025;
authors.forename: Julia
authors.initials: J
authors.lastname: Reinspach
authors.affiliation: Department of Chemical Engineering, Stanford University, Stanford, CA 94305;
authors.forename: Nan
authors.initials: N
authors.lastname: Liu
authors.affiliation: Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, CA 94025;
authors.forename: Michael F
authors.initials: MF
authors.lastname: Toney
authors.affiliation: Center for Advancing Electronics Dresden, 01187 Dresden, Germany stefan.mannsfeld@tu-dresden.de zbao@stanford.edu.
authors.forename: Stefan C B
authors.initials: SC
authors.lastname: Mannsfeld
authors.affiliation: Department of Chemical Engineering, Stanford University, Stanford, CA 94305; stefan.mannsfeld@tu-dresden.de zbao@stanford.edu.
authors.forename: Zhenan
authors.initials: Z
authors.lastname: Bao
keywords: PEDOT:PSS; solution shearing; transparent conductor