Dr. Wei Chen Profile

Dr. Wei Chen

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Proceedings Article | 12 December 2018 Paper

Graphene infrared electromagnetic interference shielding filter on ZnS and As40Se60 substrates

Kaihu Fu, Yangli Jin, Bo Xu, Bin Han, Wei Chen

Proceedings Volume 10846, 108462G (2018) https://doi.org/10.1117/12.2505465

KEYWORDS: Graphene, Zinc, Selenium, Infrared radiation, Electromagnetic coupling, Optical filters, Transmittance, Raman spectroscopy, Quartz, Glasses

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The infrared transmitting electromagnetic interference shielding (Infrared-EMI) filters were fabricated through transferring multilayer graphene on ZnS and As₄₀Se₆₀ infrared substrates. The monolayer graphene was grown by chemical vapor deposition (CVD) catalyzed by copper foil. The carrier mobility of monolayer graphene transferred on quartz glass is 1318.9 cm² /V·s, sheet resistance (R_s) is 483 Ω/ and I(2D)/I(G) of Raman result is 2.27. The monolayer graphene on copper foil was transferred on ZnS and As₄₀Se₆₀ substrates using wet chemical etching method, the multilayer graphene were overlaid on ZnS and As₄₀Se₆₀ substrates by repeating the same transferring process. The Rs of monolayer graphene film on ZnS substrate is 1100 Ω/ and decreases to 65 Ω/ as the number of graphene layer rises to 13. The R_s of monolayer graphene on As₄₀Se₆₀ substrate is 1414 Ω/ and decreases to 68 Ω/ as the number of graphene layer is up to 17. ZnS substrate transferred with 13 layers of graphene shows relative 94.7 % infrared transmittance in 8~12 μm waveband. As₄₀Se₆ substrate transferred with 17 layers of graphene on As₄₀Se₆ substrate show relative 81.3 % infrared transmittance in 8~18 μm waveband. OTA300 - 104 V. The average EMI shielding effectiveness of multilayer graphene on ZnS (13 layers) and on As₄₀Se₆₀ substrates (17 layers) in a frequency range of 30 MHz~1.5 GHz is 15.6 dB and 13.3 dB, respectively. ZnS-graphene and As₄₀Se₆₀-graphene Infrared-EMI filter realize the coexistence of infrared transmitting and EMI shielding function.

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