Journal Article Research Support, Non-U.S. Gov't charge injection 3D resonators F4-TCNQ MoS2 PBTTT Published Erratum artificial elastic media conductive composite conductive composites contact engineering distortion‐free substrate doping electrical transport flexible electronics inkjet printing inkjet-printing microwave resonators morphological responses organic electronics organic field-effect transistors organic semiconductors piezoresistive responses soft bilayer systems soft electromagnetic devices solid-state diffusion strain-coupling stretchable devices stretchable display