Abstract
The vertical-type Metal-Base Organic Transistor (MBOT) with a simple layered structure exhibits a high current-modulation under low driving voltage. In this paper, we have improved the On/Off ratio of MBOT, and analyzed the frequency response characteristics. More than 105 of On/Off ratio was attained by heating at 150°C in the atmosphere after aluminum base electrode deposition. The frequency response depended on the capacitance between base and emitter electrodes, and the frequency of transition (fT) was estimated over 200 kHz, which was higher than that of generally known lateral organic transistors. We proposed an analysis model of electrical characteristics of MBOT that indicates the maximum fT could be the order of megahertz.
