Single‐Component CMOS‐Like Logic using Diketopyrrolopyrrole‐Based Ambipolar Organic Electrochemical Transistors

Abstract Complementary circuits based on organic electrochemical transistors (OECTs) are attractive for the development of inexpensive and disposable point‐of‐care bioelectronic devices. Ambipolar OECTs, which employ a single channel material, could decrease the fabrication complexity and manufacturing costs of such circuits. An ideal channel material for ambipolar OECTs should be electrochemically stable in aqueous environments, afford facile ion insertion for both cations and anions, and also facilitate high and balanced electron and hole transport. In this study, triethylene glycol functionalized diketopyrrolopyrrole (DPP)‐based polymer is proposed for the development of ambipolar OECTs. It is shown that DPP‐based OECTs have a high and comparable figure of merit for both n‐ and p‐type operations. Logic NOT, NAND, and NOR operations with corresponding complementary circuits constructed from identical DPP‐based OECT devices are demonstrated. This study is an important step toward the development of sophisticated complementary metal–oxide–semiconductor‐like logic circuits using single‐component OECTs.