Effects of different preparation processes on the transparent electromagnetic shielding performance of graphene

In this paper, four continuous graphene films were successfully prepared by adjusting the nucleation density of graphene. The transparent electromagnetic shielding properties of graphene films under different preparation processes were studied. The results show that the electromagnetic shielding effectiveness of the graphene film does not increase with the increase of the growth thickness. Moreover, the graphene of different thicknesses are mainly absorption shielding, and the reflective shielding effectiveness is less than 0.5dB. The sample #1 is a single-layer graphene film with an optical transmittance of 97.3% and an electromagnetic shielding efficiency of 2.11dB. Its good single-layer structure and fewer defects are the reasons for obtaining higher transparent electromagnetic shielding performance.