Low-Voltage and Stretchable Organic Field Effect Transistor Array Based on Tri-Layer Elastomer Dielectric for Gas Sensing

Abstract

Stretchable organic field-effect transistors (OFETs) based gas sensors have attracted significant attention due to their inherent merits such as excellent mechanical compatibility, flexibility, and signal amplification capabilities. However, achieving low-voltage operation remains challenging, which limits their practical application. Herein, a tri-layer dielectric design is developed to achieve low-voltage, high-mobility stretchable organic transistors for gas sensors. The tri-layer dielectric, consisting of a high-κ polymer film, a non-polar polymer layer, and a cross-linking layer, allows the transistors to operate at −5 V. The stretchable transistor-based gas sensors exhibit high sensitivity of gas detection capability. Thus, stretchable field-effect transistors based on tri-layer dielectrics offer a promising strategy for advancing wearable gas sensors.