Abstract
In this study, continuous and single-crystal graphene films on copper (Cu) are synthesized by low-pressure chemical vapor deposition in a growth time of 40 min. Meticulous modulation of the oxygen and carbon supply in multistage synthesis processing and dependence of graphene properties on the oxygen and carbon supply has been investigated. It is found that double-oxygen passivation together with the optimal methane (CH4):hydrogen (H2) ratio leads to a balance between nucleation and graphene growth rate to accomplish continuous single-crystal bilayer graphene films in a short time. Moreover, the graphene-based field effect transistor reveals the superior hole mobility of 5565 cm2 V−1 s−1. Our study provides a simple chemical vapor deposition procedure to achieve high quality graphene film on Cu in a short time.
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