Controlling the Neuromorphic Behavior of Organic Electrochemical Transistors by Blending Mixed and Ion Conductors

Shunsuke Yamamoto, George G. Malliaras

Research output: Contribution to journalArticlepeer-review

Abstract

We examine the neuromorphic behavior of organic electrochemical transistors (OECTs) based on polymer blends of a mixed conductor (PEDOT:PSS) and an ion conductor (PSSNa). We show that the addition of an ionic conductor into PEDOT:PSS decreases the information retention time in paired-pulse depression (PPD) experiments and speeds up the response in dynamic filtering experiments. Detailed studies of transient properties demonstrate that the relevant time scales for the neuromorphic response are determined by an ion injection in and an extraction out of the film. These results bring to the forefront OECTs as devices with neuromorphic properties that are readily engineered.

Original languageEnglish
Pages (from-to)2224-2228
Number of pages5
JournalACS Applied Electronic Materials
Volume2
Issue number7
DOIs
Publication statusPublished - 2020 Jul 28

Keywords

  • mixed conductors
  • neuromorphic devices
  • organic electrochemical transistors
  • paired-pulse depression
  • polymer blends

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Electrochemistry

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