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Abstract
Al doped and Cu doped ZnO NRAs/Graphene composite material are synthesized by introducing the concentrations of 0%, 2%, 4%, 6%, 8% using hydrothermal method, and their structure and morphology are characterized by XRD, EDS and SEM, XPS. The results show that Al:6% doped and Cu:4% doped ZnO/Graphene nanorod array have the best crystal quality and morphology compared to other concentrations of doped samples. Other than that, the field emission performances of Al:6% doped and Cu:4% doped ZnO NRAs/Graphene are measured. The turn-on field and field enhancement factor of Al:6% doped ZnO NRAs/Graphene are 1.51 V/mm and 11264. The turn-on field and field enhancement factor of Cu:4% doped ZnO NRAs/Graphene are 1.80 V/mm and 10076. It is found that the field emission performance of Al: 6% doped ZnO NRAs/Graphene is higher than the sample with doped Cu, which indicating that Al-doped ZnO NRAs/Graphene might have promising applications for various field emission devices.