Vertical-Type Organic Transistors Enabling High Current and High Frequency Operation

Abstract

Generally, organic transistors have field-effect transistor structure, where current flows in the plane of the organic film, and the channel length is determined by fine patterning technique. In contrast, vertical-type organic transistors have sandwich structure composed of organic/metal/organic layers, where current flows in vertical direction. In this structure, very short channel length can be achieved because it corresponds to the film thickness. In addition, current flows in whole area of the device. As a result, the vertical-type organic transistors are very suitable for high current and high frequency operation. Recently, we have proposed novel vertical-type organic transistors named the metal-base organic transistor（MBOT）. In this report, we review device performance, operation mechanism, application and materials for MBOTs.