Highly optically transparent graphene mesh for electromagnetic interference shielding

The update of optoelectronic technology requires that the optical window has the dual functions of optical transparency and electromagnetic shielding. A transparent electromagnetic shielding method based on graphene mesh structure is proposed. The optical transmittance of the graphene mesh was theoretically analyzed. Graphene mesh is fabricated by ordinary mask photolithography technology to arbitrarily adjust the structure and number of layers. It retains the same properties as the unpatterned graphene film. Through mesh structure design and layer number control, graphene mesh can be used to replace graphene film with uniform thickness. The average transmittance of the four-layer graphene mesh in the 3–5 μm band is 95.26%, and the average shielding efficiency in the 12–18 GHz band is 3.86 dB. It shows that the graphene mesh maintains high optical transmittance and has good electromagnetic shielding effectiveness. • The graphene mesh has uniform thickness. • The graphene mesh retains the same properties as the unpatterned graphene film. • The average transmittance of the four-layer graphene mesh is 95.26%. • The SE and optical transparency properties are simultaneously improved.