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Graphene surface contacts of tin disulfide transistors for switching performance improvement and contact resistance reduction

Title
Graphene surface contacts of tin disulfide transistors for switching performance improvement and contact resistance reduction
Author
설원제
Keywords
transistor; graphene; transition metal dichalcogenide; tin disulfide; nanoelectronic
Issue Date
2019-10
Publisher
IOP PUBLISHING LTD
Citation
NANOTECHNOLOGY, v. 30, no. 40, article no. 405203
Abstract
We investigated the performance improvement of tin disulfide channel transistors by graphene contact configurations. From its two-dimensional nature, graphene can make electric contacts only at the outermost layers of the channel. For intralayer current flow, two graphene flakes are contacted at the channel's top or bottom layer. For interlayer current flow, one flake is contacted at the top and bottom of each layer. We compared the transistor performance in terms of current magnitude, mobility, and subthreshold swing between the configurations. From such observations, we deduced that device characteristics depend on resistivity or doping level of individual graphene flakes. We also found that interlayer flow excels in the on-current magnitude and the mobility, and that top-contact configuration excels in the subthreshold swing.
URI
https://iopscience.iop.org/article/10.1088/1361-6528/ab2febhttps://repository.hanyang.ac.kr/handle/20.500.11754/151480
ISSN
0957-4484; 1361-6528
DOI
10.1088/1361-6528/ab2feb
Appears in Collections:
RESEARCH INSTITUTE[S](부설연구소) > ETC
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