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Transparent Conducting Graphene Hybrid Films To Improve Electromagnetic Interference (EMI) Shielding Performance of
Limin Ma1,2, Zhengang Lu1, Jiubin Tan1
1Ultra-Precision Optical and Electronic Instrument Engineering Centre, Harbin Institute of Technology , Harbin 150001, People's Republic of China.
ACS Applied Materials & Interfaces
|September 12, 2017
Summary
Conductive graphene hybrid films offer superior electromagnetic interference shielding. These films significantly enhance shielding effectiveness while maintaining high optical transparency, making them ideal for advanced applications.
Area of Science:
- Materials Science
- Nanotechnology
- Electrical Engineering
Background:
- Graphene-based hybrids are significant for various applications due to their unique properties.
- Developing materials with high conductivity and electromagnetic interference (EMI) shielding is crucial.
Purpose of the Study:
- To fabricate and characterize conductive graphene hybrid films for EMI shielding.
- To evaluate the performance of these films in terms of conductivity and shielding effectiveness.
- To compare the performance with pristine graphene and existing technologies.
Main Methods:
- Fabrication of conductive graphene hybrid films with a metallic network encapsulated between graphene and a quartz-glass substrate.
- Characterization of sheet resistance and optical transmittance.
- Measurement of microwave shielding effectiveness (SE) in Ku- and Ka-bands.
Main Results:
- Sheet resistance was reduced from 813.27 to 5.53 Ω/sq at 91% optical transmittance.
- Microwave SE exceeded 23.60 dB (Ku-band) and 13.48 dB (Ka-band).
- SE was enhanced by 25.45 dB compared to pristine graphene, achieving 99.7% energy attenuation.
Conclusions:
- Graphene hybrid films demonstrate high conductivity and superior EMI shielding comparable to Indium Tin Oxide (ITO).
- The materials are earth-abundant and facilitate large-scale fabrication.
- These films are highly attractive for transparent EMI shielding applications.
