Freestanding Organic Charge-Transfer Conformal Electronics

Abstract

Wearable conformal electronics are essential components for next-generation humanlike sensing devices that can accurately respond to external stimuli in non-planar and dynamic surfaces. However, to explore this potential, it is indispensable to achieve the desired level of deformability and charge transport mobility in strain-accommodating soft semiconductors. Here we show pseudo-two-dimensional freestanding conjugated polymer heterojunction nanosheets integrated into substrate-free conformal electronics, owing to their exceptional crystalline controlled charge transport and high level of mechanical strength. These freestanding and mechanical robust polymer nanosheets can be adapted into a variety of artificial structured surfaces such as fibers, squares, circles, etc, which produce large-area stretchable conformal charge-transfer sensors for real-time static and dynamic monitoring.