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Abstract Organic electrochemical transistors (OECTs) are one of the promising building blocks to realize next‐generation bioelectronics. To date, however, the performance and signal processing capabilities of these devices remain limited by their stability and speed. Herein, the authors demonstrate stable and fast n ‐type organic electrochemical transistors based on a side‐chain‐free ladder polymer, poly(benzimidazoanthradiisoquinolinedione). The device demonstrated fast normalized transient speed of 0.56 ± 0.17 ms um −2 and excellent long‐term stability in aqueous electrolytes, with no significant drop in its doping current after 50 000 successive doping/dedoping cycles and 2‐month storage at ambient conditions. These unique characteristics make this polymer especially suitable for bioelectronics, such as being used as a pull‐down channel in a complementary inverter for long‐term stable detection of electrophysiological signals. Moreover, the developed device shows a reversible anti‐ambipolar behavior, enabling reconfigurable electronics to be realized using a single material. These results go beyond the conventional OECT and demonstrate the potential of OECTs to exhibit dynamically configurable functionalities for next‐generation reconfigurable electronics.
Wu et al. (Tue,) studied this question.