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Improving Radio Frequency Transmission Properties of Graphene via Carrier Concentration Control toward High Frequency Transmission Line Applications
Author(s) -
Yang Jae Hoon,
Yang Hyoung Woo,
Jun Byoung Ok,
Shin Jeong Hee,
Kim Seunguk,
Jang ARang,
Yoon Seong In,
Shin Hyeon Suk,
Park Deoksoo,
Park Kyungho,
Yoon Duhee,
Sohn Jung Inn,
Cha SeungNam,
Kang Dae Joon,
Jang Jae Eun
Publication year - 2019
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201808057
Subject(s) - graphene , materials science , optoelectronics , radio frequency , radio frequency power transmission , transmission line , transmission (telecommunications) , amorphous solid , low frequency , terahertz radiation , nanotechnology , telecommunications , computer science , amplifier , chemistry , organic chemistry , cmos
Graphene has been gradually studied as a high‐frequency transmission line material owing to high carrier mobility with frequency independence up to a few THz. However, the graphene‐based transmission lines have poor conductivity due to their low carrier concentration. Here, it is observed that the radio frequency (RF) transmission performance could be severely hampered by the defect‐induced scattering, even though the carrier concentration is increased. As a possible solution, the deposition of the amorphous carbon on the graphene is studied in the high‐frequency region up to 110 GHz. The DC resistance is reduced by as much as 60%, and the RF transmission property is also enhanced by 3 dB. Also, the amorphous carbon covered graphene shows stable performance under a harsh environment. These results prove that the carrier concentration control is an effective and a facile method to improve the transmission performance of graphene. It opens up the possibilities of using graphene as interconnects in the ultrahigh‐frequency region.