Spin transport in heavily doped PEDOT:PSS with tunable electrical conductivity

ORAL

Abstract

Among pi-conjugated conducting polymers, doped poly(3,4-ethylenedioxythiophene):polystyrene sulfonate, or PEDOT:PSS, has been widely used in optoelectronic devices. Interestingly the PEDOT:PSS electrical conductivity can vary substantially between 10-3 S/cm to 103 S/cm depending on the doping concentration determined by the solvents and additives used. We report a comparative studies of the spin diffuse lengths, spin relaxation times and charge motilities in different PEDOT:PSS compounds with various conductivities using the techniques of spin-pumping, electron spin resonance and field effect transistor, respectively. In particular we contrast the charge transport and spin transport in these materials.

*Research sponsored by the NSF (DMR-1404634) and NSF-MRSEC (DMR-1121252)

–

Authors

  • Dali Sun

    • Univ of Utah
    • Department of Physics and Astronomy, University of Utah, Salt Lake City, Utah 84112, USA
    • Department of Physics & Astronomy, University of Utah

  • Yaxin Zhai

    • University of Utah
    • Department of Physics and Astronomy, University of Utah, Salt Lake City, Utah 84112, USA

  • Matthew Groesbeck

    • Department of Physics and Astronomy, University of Utah, Salt Lake City, Utah 84112, USA

  • Charlie Zhang

    • Univ of Utah
    • Department of Physics and Astronomy, University of Utah, Salt Lake City, Utah 84112, USA

  • Kipp J. van Schooten

    • Department of Physics and Astronomy, University of Utah, Salt Lake City, Utah 84112, USA

  • Oana Jurchescu

    • Wake Forest University
    • Department of Physics, Wake Forest University, Winston-Salem, North Carolina 27109, USA

  • Reghu Menon

    • Department of Physics, Indian Institute of Science, Bangalore 560012, India

  • C Boehme

    • Department of Physics and Astronomy, University of Utah, Salt Lake City, Utah 84112, USA
    • University of Utah
    • Department of Physics & Astronomy, University of Utah
    • Department of Physics and Astronomy, University of Utah, Salt Lake City, 84112, USA

  • Zeev Valy Vardeny

    • Univ of Utah
    • Department of Physics and Astronomy, University of Utah, Salt Lake City, Utah 84112, USA
    • University of Utah
    • Department of Physics & Astronomy, University of Utah