▎ 摘　　要

Graphene has excellent electronic properties and has broad application prospects in future photovoltaic devices. However, it is often flawed since its perfect form cannot be obtained in the actual preparation process, resulting in different electronic properties. In this paper, we combined the Green function with density functional theory to detect the electron transport properties of edge-doped heteroatom graphene nanoribbons. The current was calculated by energizing the material and it was found that the edge doping of three isotopes of sulfur, oxygen and nitrogen caused the reduction of electrical transport of graphene nanoribbons and hence exhibit different characteristics, with which some specific graphene nano optoelectronic devices could be made, which would possess better performance.