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Switching p-type to high-performance n-type organic electrochemical transistors via doped state engineering

Author

Listed:
  • Peiyun Li

    (Peking University)

  • Junwei Shi

    (Peking University
    Peking University)

  • Yuqiu Lei

    (Peking University)

  • Zhen Huang

    (Peking University)

  • Ting Lei

    (Peking University)

Abstract

High-performance n-type organic electrochemical transistors (OECTs) are essential for logic circuits and sensors. However, the performances of n-type OECTs lag far behind that of p-type ones. Conventional wisdom posits that the LUMO energy level dictates the n-type performance. Herein, we show that engineering the doped state is more critical for n-type OECT polymers. By balancing more charges to the donor moiety, we could effectively switch a p-type polymer to high-performance n-type material. Based on this concept, the polymer, P(gTDPP2FT), exhibits a record high n-type OECT performance with μC* of 54.8 F cm−1 V−1 s−1, mobility of 0.35 cm2 V−1 s−1, and response speed of τon/τoff = 1.75/0.15 ms. Calculations and comparison studies show that the conversion is primarily due to the more uniform charges, stabilized negative polaron, enhanced conformation, and backbone planarity at negatively charged states. Our work highlights the critical role of understanding and engineering polymers’ doped states.

Suggested Citation

  • Peiyun Li & Junwei Shi & Yuqiu Lei & Zhen Huang & Ting Lei, 2022. "Switching p-type to high-performance n-type organic electrochemical transistors via doped state engineering," Nature Communications, Nature, vol. 13(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-33553-w
    DOI: 10.1038/s41467-022-33553-w
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