Recent Developments in an Organic Transistor-Based Gas Sensors

In order to realize the comprehensive characteristics of human skin, it is essential to integrate various sensing modules that can distinguish not only physical deformation but also external stimuli including temperature, light, humidity, and harmful gases. In particular, gas sensors can be expected to monitor air quality by detecting gas molecules present in the surroundings, as well as to be able to diagnose various diseases early from the gases emitted from the body. For application to electronic skin, the development of gas sensors using organic transistors is essential, and it focuses on controlling the molecular structure of organic active layers and developing new materials to achieve fast response speed and high sensitivity. In this paper, we will introduce the recent research trend of organic transistor-based gas sensors and suggest future research directions.