Figure 7 .

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.

Ye et al. Nanoscale Research Letters 2012 7:218   doi:10.1186/1556-276X-7-218
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