▎ 摘　　要

In this report, we introduced a modified non-equilibrium Green's function method to investigate the structural effects on the field emission current from an armchair graphene nanoribbon. We introduce a modified self-energy which is useful to study the effects of potential barrier in the field emission devices. Investigation into the effects of hydrogen passivation and applied strain can be realised using our modified formalism. Also a practical method to consider the effect of device parameters, such as channel length, anode-cathode separation and gate potential can be provided by the proposed formalism. The quantum effects of the emitter's structure on the field emission are achievable by our introduced method.