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Influence of PEDOT:PSS crystallinity and composition on electrochemical transistor performance and long-term stability

Author

Listed:
  • Seong-Min Kim

    (Gwangju Institute of Science and Technology)

  • Chang-Hyun Kim

    (Gwangju Institute of Science and Technology
    Gwangju Institute of Science and Technology
    Gachon University)

  • Youngseok Kim

    (Gwangju Institute of Science and Technology)

  • Nara Kim

    (Gwangju Institute of Science and Technology
    ITN, Linköping University)

  • Won-June Lee

    (Gwangju Institute of Science and Technology)

  • Eun-Hak Lee

    (Gwangju Institute of Science and Technology)

  • Dokyun Kim

    (Gwangju Institute of Science and Technology)

  • Sungjun Park

    (RIKEN Center for Emergent Matter Science (CEMS))

  • Kwanghee Lee

    (Gwangju Institute of Science and Technology
    Gwangju Institute of Science and Technology
    Gwangju Institute of Science and Technology)

  • Jonathan Rivnay

    (Northwestern University)

  • Myung-Han Yoon

    (Gwangju Institute of Science and Technology)

Abstract

Owing to the mixed electron/hole and ion transport in the aqueous environment, poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)-based organic electrochemical transistor has been regarded as one of the most promising device platforms for bioelectronics. Nonetheless, there exist very few in-depth studies on how intrinsic channel material properties affect their performance and long-term stability in aqueous environments. Herein, we investigated the correlation among film microstructural crystallinity/composition, device performance, and aqueous stability in poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) films. The highly organized anisotropic ordering in crystallized conducting polymer films led to remarkable device characteristics such as large transconductance (∼20 mS), extraordinary volumetric capacitance (113 F·cm−3), and unprecedentedly high [μC*] value (∼490 F·cm−1V−1s−1). Simultaneously, minimized poly(styrenesulfonate) residues in the crystallized film substantially afforded marginal film swelling and robust operational stability even after >20-day water immersion, >2000-time repeated on-off switching, or high-temperature/pressure sterilization. We expect that the present study will contribute to the development of long-term stable implantable bioelectronics for neural recording/stimulation.

Suggested Citation

  • Seong-Min Kim & Chang-Hyun Kim & Youngseok Kim & Nara Kim & Won-June Lee & Eun-Hak Lee & Dokyun Kim & Sungjun Park & Kwanghee Lee & Jonathan Rivnay & Myung-Han Yoon, 2018. "Influence of PEDOT:PSS crystallinity and composition on electrochemical transistor performance and long-term stability," Nature Communications, Nature, vol. 9(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-06084-6
    DOI: 10.1038/s41467-018-06084-6
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    Cited by:

    1. Ji Hwan Kim & Roman Halaksa & Il-Young Jo & Hyungju Ahn & Peter A. Gilhooly-Finn & Inho Lee & Sungjun Park & Christian B. Nielsen & Myung-Han Yoon, 2023. "Peculiar transient behaviors of organic electrochemical transistors governed by ion injection directionality," Nature Communications, Nature, vol. 14(1), pages 1-12, December.

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