▎ 摘　　要

NOVELTY - Opening graphene band gap comprises separately preparing gallium oxide layer and graphene layer, transferring the graphene layer onto the gallium oxide layer, changing the electronic structure of the graphene by charge transfer between gallium oxide and graphene to form a gallium oxide/graphene heterojunction, and opening the graphene band gap. USE - The method is useful for opening graphene band gap. ADVANTAGE - The method: has simple preparation process and clear device structure; and can open the graphene band gap to a large extent, which is of great significance for applying graphene to the field of semiconductor electronic devices.