Extremely sharp-switching operation of printed transistors using highly layered-crystalline organic semiconductors

Abstract

Development of organic semiconductors (OSCs) showing very high layered crystallinity has recently prompted considerable evolution of printed organic field-effect transistors. Herein, we first illustrate several intriguing aspects of highly layered-crystalline OSCs and also discuss molecular origin of the high layered crystallinity. Then we show that it is possible to manufacture highly uniform and ultrathin crystalline semiconductor layers by taking advantage of the self-organized growth of OSC layers through solution processes. Particularly, a unique method allows to produce extremely clean semiconductor interfaces that provide practical device performances showing very sharp and stable switching operation at low voltages. We report the present status of basic studies on the printed electronics technology.