n-Type Organic Electrochemical Transistors with High Transconductance and Stability

Abstract
An n-type conjugated polymer based on diazaisoindigo (AIID) and fluorinated thiophene units is introduced. Combining the strong electron-accepting properties of AIID with backbone fluorination produced gAIID-2FT, leading to organic electrochemical transistors (OECTs) with normalized values of 4.09 F cm–1 V–1 s–1 and a normalized transconductance (gm,norm) of 0.94 S cm–1. The resulting OECTs exhibit exceptional operational stability and long shelf-life in ambient conditions, preserving 100% of the original maximum drain current after over 3 h of continuous operation and 28 days of storage in the air. Our work highlights the advantages of integrating strong electron acceptors with donor fluorination to boost the performance and stability of n-type OECTs.

Citation
Wang, Y., Zhu, G., Zeglio, E., Castillo, T. C. H., Haseena, S., Ravva, M. K., Cong, S., Chen, J., Lan, L., Li, Z., Herland, A., McCulloch, I., Inal, S., & Yue, W. (2023). n-Type Organic Electrochemical Transistors with High Transconductance and Stability. Chemistry of Materials. https://doi.org/10.1021/acs.chemmater.2c02447

Acknowledgements
The authors thank the National Natural Science Foundation of China (Grant No. 21875291) and the Guangdong Provincial Foundation for Basic and Applied Basic Research (Grant No. 2021A1515110261) for the financial support. E.Z. and A.H. gratefully acknowledge the Knut and Alice Wallenberg Foundation (Grant No. KAW2015.0178), the Swedish Research Council (Grant No. 2018-03483 and International Postdoc Grant No. 2017-06381), and the European Union’s Horizon 2020 research and innovation program under the Marie Sklodowska-Curie grant agreement “BioResORGEL” (Program No. 101025599).

Publisher
American Chemical Society (ACS)

Journal
Chemistry of Materials

DOI
10.1021/acs.chemmater.2c02447

Additional Links
https://pubs.acs.org/doi/abs/10.1021/acs.chemmater.2c02447

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