A fully-integrated flexible in-sensor computing circuit based on gel-gated organic electrochemical transistors

Organic electrochemical transistors (OECTs) are promising technologies for biosensing and brain-inspired computing due to their low-power signal amplification and neuron-like behavior. However, their manufacturing remains complex, especially when fabricated into flexible forms. To address the growing demand for flexible OECTs in wearable bioelectronics, in this work, we propose: i) a rapid and low-cost fabrication approach using flexible PCB (fPCB) technology and customized inkjet printing; ii) a non-aqueous gel-gated approach to improve the electrochemical stability of flexible OECTs associated with fPCBs; and iii) the above two approaches help accomplish the following concept: low-cost, integrated, and in-sensing computing system can be more readily realized with flexible OECT devices. This platform has been validated for scalability, stability, and performance in real-world applications, paving the way for developing low-cost, flexible, multifunctional OECT systems.