Research Progress and Application of Fabric-Based Organic Electrochemical Transistors: A Review

With the development of wearable electronic devices and flexible biosensing technology, organic electrochemical transistors (OECTs) have received more and more attention. Fabric-based OECTs (F-OECTs) have a broad application prospect in wearable electronic devices due to their substrate flexibility, breathability, and other advantages. This article first introduces the structure and operation mechanism of flexible OECTs, second focuses on the relationship between F-OECT materials, fabrication methods, device structures, and so on and transistor performance, and, finally, describes the application of F-OECTs in various fields (e.g., biomolecule monitoring, gas monitoring, health monitoring, and synaptic neuromorphology), which clarifies the importance of F-OECTs for the development of wearable electronic devices. In this article, it is pointed out that F-OECT should ensure the bendability and stability of the transistor without decreasing the electrical performance (certain switching ratio and transconductance) and analyze the role of electrode materials, semiconductor materials, and preparation process in relation to the switching ratio and transconductance of F-OECT, so as to realize the wide application of F-OECT and provide a reference for the design of wearable electronic devices.