Graphene base hot electron transistors with high on/off current ratios

Abstract

Despite exceptional intrinsic properties of graphene, field effect transistors with graphene channels (GFETs) are limited by the absence of an electronic band gap. The resulting low ION-IOFF ratio and low output resistance makes GFETs unsuitable for logic applications [1] and limits radio frequency (RF) applications [2]. We will present a graphene-based electronic device in which the 0 eV band gap does not limit the device performance: a hot electron transistor (HET) with a graphene base (Graphene Base Transistor, GBT) [3,4]. The single-atomic thinness and high conductivity are decisive advantages of a graphene base [5]. Here, we report on the fabrication and full DC-characterization of GBTs with high ION-IOFF ratio of 105.