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The organic electrochemical transistor conundrum when reporting a mixed ionic–electronic transport figure of merit

Nature Materials volume 23, pages 2–8 (2024)Cite this article

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An essential part of developing organic mixed ionic–electronic conducting materials and organic electrochemical transistors is consistent and standardized reporting of the product of charge carrier mobility and volumetric capacitance, the μC* product. This Comment argues that unexpected changes in transistor channel resistance can overestimate this figure of merit, leading to a confusion of comparisons in the literature.

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Fig. 1: OECTs.
Fig. 2: The μC* product for representative OMIECs.
Fig. 3: The mobility values for representative OMIECs.
Fig. 4: RC and RCH in OECTs.

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Acknowledgements

This work was supported by the National Science Foundation under Cooperative Agreement No. 1849213. We thank R. Sarabia Riquelme and M. Weisenburger for the PEDOT:PSS fibres used to fabricate the PEDOT:PSS OECTs.

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Authors and Affiliations

  1. Department of Chemical and Materials Engineering, Center for Applied Energy Research, University of Kentucky, Lexington, KY, USA

    Maryam Shahi, Vianna N. Le, Paula Alarcon Espejo & Alexandra F. Paterson

  2. Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Oxford, UK

    Maryam Alsufyani, Christina J. Kousseff & Iain McCulloch

  3. King Abdullah University of Science and Technology, KAUST Solar Centre, Thuwal, Saudi Arabia

    Maryam Alsufyani, Christina J. Kousseff & Iain McCulloch

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  1. Maryam Shahi
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Nature Materials thanks Xugang Guo and the other, anonymous, reviewer(s) for their contribution to the peer review of this work.

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Shahi, M., Le, V.N., Alarcon Espejo, P. et al. The organic electrochemical transistor conundrum when reporting a mixed ionic–electronic transport figure of merit. Nat. Mater. 23, 2–8 (2024). https://doi.org/10.1038/s41563-023-01672-4

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