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Small signal analysis for the characterization of organic electrochemical transistors

Author

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  • Youngseok Kim

    (Chalmers University of Technology)

  • Joost Kimpel

    (Chalmers University of Technology)

  • Alexander Giovannitti

    (Chalmers University of Technology)

  • Christian Müller

    (Chalmers University of Technology)

Abstract

A method for the characterization of organic electrochemical transistors (OECTs) based on small signal analysis is presented that allows to determine the electronic mobility as a function of continuous gate potential using a standard two-channel AC potentiostat. Vector analysis in the frequency domain allows to exclude parasitic components in both ionic and electronic conduction regardless of film thickness, thus resulting in a standard deviation as low as 4%. Besides the electronic mobility, small signal analysis of OECTs also provides information about a wide range of other parameters including the conductance, transconductance, conductivity and volumetric capacitance through a single measurement. General applicability of small signal analysis is demonstrated by characterizing devices based on n-type, p-type, and ambipolar materials operating in accumulation or depletion modes. Accurate benchmarking of organic mixed ionic-electronic conductors through small signal analysis can be anticipated to guide both materials development and the design of bioelectronic devices.

Suggested Citation

  • Youngseok Kim & Joost Kimpel & Alexander Giovannitti & Christian Müller, 2024. "Small signal analysis for the characterization of organic electrochemical transistors," Nature Communications, Nature, vol. 15(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-51883-9
    DOI: 10.1038/s41467-024-51883-9
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    References listed on IDEAS

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    1. Peter Andersson Ersman & Roman Lassnig & Jan Strandberg & Deyu Tu & Vahid Keshmiri & Robert Forchheimer & Simone Fabiano & Göran Gustafsson & Magnus Berggren, 2019. "All-printed large-scale integrated circuits based on organic electrochemical transistors," Nature Communications, Nature, vol. 10(1), pages 1-9, December.
    2. Jonathan Rivnay & Sahika Inal & Brian A. Collins & Michele Sessolo & Eleni Stavrinidou & Xenofon Strakosas & Christopher Tassone & Dean M. Delongchamp & George G. Malliaras, 2016. "Structural control of mixed ionic and electronic transport in conducting polymers," Nature Communications, Nature, vol. 7(1), pages 1-9, September.
    3. Alexander Giovannitti & Christian B. Nielsen & Dan-Tiberiu Sbircea & Sahika Inal & Mary Donahue & Muhammad R. Niazi & David A. Hanifi & Aram Amassian & George G. Malliaras & Jonathan Rivnay & Iain McC, 2016. "N-type organic electrochemical transistors with stability in water," Nature Communications, Nature, vol. 7(1), pages 1-10, December.
    4. Sahika Inal & George G. Malliaras & Jonathan Rivnay, 2017. "Benchmarking organic mixed conductors for transistors," Nature Communications, Nature, vol. 8(1), pages 1-7, December.
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