Journal
2D MATERIALS
Volume 4, Issue 2, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/2053-1583/aa57f8
Keywords
graphene; metallic mesh; electromagnetic interference shielding; microwave absorption; transparence
Categories
Funding
- NSFC [61575075]
- Fundamental Research Funds for the Central Universities [HIT.NSRIF.2014020]
- Natural Science Foundation of Heilongjiang Province [F2016014]
- Postdoctoral Science-Research Development Foundation of Heilongjiang Province [LBH-Q13078]
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A high-performance transparent electromagnetic interference (EMI) shielding material based on a graphene/metallic mesh/transparent dielectric (GMTD) hybrid structure is designed and characterized. It consists of stacked graphene and metallic mesh layers, with neighboring layers separated by a quartz-glass substrsate. The GMTD hybrid structure combines the microwave-reflecting characteristics of the metallic mesh and the microwave-absorbing characteristics of graphene to achieve simultaneously high visible transmittance, strong microwave shielding effectiveness (SE), and low microwave reflection. Experiments show that a double-graphene and double-metallic mesh GMTD hybrid structure with a mesh periodicity of 160 mu m provides microwave SE exceeding 47.79 dB in the K-u-band, and an SE exceeding 32.12 dB in the K-a-band, with a maximum value of 37.78 dB at 26.5 GHz. SE by absorption exceeds 30.78 dB in the K-a-band, with a maximum value of 34.55 dB at 26.5 GHz, while maintaining a normalized visible transmittance of similar to 85% at 700 nm. This remarkable performance favors the application of the proposed structure as a transparent microwave shield and absorber, and offers a new strategy for transparent EMI shielding.
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