Ultra-fast fabrication of polycrystalline thin films utilizing liquid crystallinity for organic transistors

Abstract

Ｗｅ have successfully fabricated polycrystalline thin films having uniform and flat surface morphology of liquid crystalline organic semiconductors, i.e., Ph-BTBT-10 and 8-BTBT-8, by dip-coating method at 40mm/s or more, which is 2000 times faster than that for single crystalline thin films, when coated at around their liquid crystalline temperatures . Field effect transistors fabricated with the polycrystalline thin films exhibited high mobility of over 4cm2/Vs and 5.2cm2/vs in BGBC configuration, respectively .