Fabrication of graphene-based films for transparent electrodes

Graphene is a monolayer of tightly-packed carbon atoms that exhibits desirable properties such as high transparency and very low resistance at room temperature. These are attractive for transparent conducting film (TCF) applications. However, state-of-the-art fabrication techniques limit the quality of graphene when compared with the standard TCF material, ITO. Here, we report an electrochemical delamination method for graphene-based film fabrication. Starting from both chemical vapor deposition (CVD)-graphene and graphene oxide solution, we are able to produce large-scale TCFs in few minutes. Corresponding material characterization and reaction mechanisms are described and discussed. The resulting films are competitive with conventional transparent electrodes, and particularly with other transparent electrodes being considered for plastic electronics.