A Semiconducting Two-Dimensional Polymer as an Organic Electrochemical Transistor Active Layer: Article No. 2110703

Reem Rashid, Austin Evans, Lyndon Hall, Raghunath Dasari, Emily Roesner, Seth Marder, Deanna D'Allesandro, WIlliam Dichtel, Jonathan Rivnay

Research output: Contribution to journalArticlepeer-review

22 Scopus Citations

Abstract

Organic electrochemical transistors (OECTs) are devices with broad potential in bioelectronic sensing, circuits, and neuromorphic hardware. Their unique properties arise from the use of organic mixed ionic/electronic conductors (OMIECs) as the active channel. Typical OMIECs are linear polymers, where defined and controlled microstructure/morphology, and reliable characterization of transport and charging can be elusive. Semiconducting two-dimensional polymers (2DPs) present a new avenue in OMIEC materials development, enabling electronic transport along with precise control of well-defined channels ideal for ion transport/intercalation. To this end, a recently reported 2DP, TIIP, is synthesized and patterned at 10 um resolution as the channel of a transistor. The TIIP films demonstrate textured microstructure and show semiconducting properties with accessible oxidation states. Operating in aqueous electrolyte, the 2DP-OECT exhibits a device-scale hole mobility of 0.05 cm2 V-1 s-1 and a uC* figure of merit of 1.75 F cm-1 V-1 s-1. 2DP OMIECs thus offer new synthetic degrees of freedom to control OECT performance and may enable additional opportunities such as ion selectivity or improved stability through reduced morphological modulation during device operation.
Original languageAmerican English
Number of pages7
JournalAdvanced Materials
Volume34
Issue number21
DOIs
StatePublished - 2022

NREL Publication Number

  • NREL/JA-5A00-82606

Keywords

  • 2D-polymer
  • covalent organic framework
  • organic electrochemical transistor
  • thin film transistor

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