Journal Article charge injection F4-TCNQ MoS2 PBTTT Published Erratum charged impurity scattering contact engineering cross-bar array architecture density functional theory doping electrical transport field effect transistors nonvolatile memory organic electrochemical transistor organic field-effect transistors organic mixed ionic–electronic conductor organo-metal halide perovskite perovskite memory devices resistive switching solid-state diffusion surface charge transfer doping thiol-molecules tungsten diselenide ultraflexible device vertical device