Figure 7From: Novel optoelectronic devices based on single semiconductor nanowires (nanobelts)Schematic illustration of the energy band diagrams of a graphene/semiconductor heterojunction. (a) The thermal equilibrium energy band diagram. (b) The energy band diagram of the heterojunction under a forward bias. Φ: the work function of graphene; χ: the electron affinity of the semiconductor.Back to article page