Single-gate bandgap opening of bilayer graphene by dual molecular doping

Abstract

Dual doping-driven perpendicular electric field with opposite directions remarkably increase the on/off current ratio of bilayer graphene field-effect transistors. This unambiguously proves that it is possible to open a bandgap with two molecular dopants (F4-TCNQ and NH2 -functionalized self-assembled monolayers (SAMs)) even in a single-gate device structure.

Keywords: bandgap opening; bilayer graphene; field-effect transistors; molecular doping; self-assembled monolayers.