Van der Waals Metal-Semiconductor Contacts for High-Performance Polymer Field-Effect Transistors

Van der Waals contacts have been regarded as a promising route to minimize contact resistances between metal electrodes and semiconductor channels in two-dimensional field-effect transistors, but have rarely reported for organic transistors due to complicated manufacture processes, which usually cause damages to organic semiconductors. Herein, we proposed a novel electrode transferring process by rationally engineering the sacrificial layers to build high-quality Van der Waals contacts for organic polymer transistors, leading to the ultrahigh on/off ratio of 10
⁸
and the excellent mobility of
$1.7 \text{cm}^{2}\mathrm{V}^{-1}\mathrm{s} 1$
. We further manufactured short-channel transistor arrays with robust Van der Waals contacts, offering a promising strategy of fabricating high-performance polymer electronics.