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Vertical Thin Film Transistor Based on Conductivity Modulation of Graphene Electrode by Micro-Hole Patterning

Title
Vertical Thin Film Transistor Based on Conductivity Modulation of Graphene Electrode by Micro-Hole Patterning
Author(s)
Pyo, GoeunLee, Gwang JunLee, SeungchulYang, Jae HoonHeo, Su JinChoi, Gyeong HyeonCha, SeungNamJang, Jae Eun
Issued Date
2022-04
Citation
Advanced Electronic Materials, v.8, no.4
Type
Article
Author Keywords
nanometer channelpatterned electrodevertical transistorgraphene electrodegraphene transistor
Keywords
FIELD-EFFECT TRANSISTORSLOW-VOLTAGELOW-POWERBARRIERINJECTION
ISSN
2199-160X
Abstract
The vertical thin film transistor (VTFT) has several advantages over the planar thin film transistor, such as a high current density and low operating voltage, because of the structural specificity. However, it is difficult to realize transistor operation in a VTFT because of the structural limitation that the gate field is blocked. As a solution, the conductivity modulation of a graphene electrode is studied with a micro-hole structure as a gate field transfer electrode. The micro-hole array pattern in the graphene allows better penetration of the gate field to junction and the work function to be modulated. Moreover, the patterning induces a doping effect on the graphene which results in a high barrier at the p-n junction and improves the conductivity in the device operation. The optimum performance is shown at 5 mu m hole size and 30% hole ratio by analyzing the hole size and the area ratio. The proposed structure shows about 20 times higher on-current than a planar transistor with a same active area. Compared to a VTFT using simple graphene working function modulation, the proposed structure has an on-state current that is ten times higher and off-state current that is reduced 50%, and therefore has an improved on-off ratio. © 2021 Wiley-VCH GmbH
URI
http://hdl.handle.net/20.500.11750/16042
DOI
10.1002/aelm.202101000
Publisher
Wiley-VCH Verlag
Related Researcher
  • 장재은 Jang, Jae Eun
  • Research Interests Nanoelectroinc device; 생체 신호 센싱 시스템 및 생체 모방 디바이스; 나노 통신 디바이스
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Appears in Collections:
Department of Electrical Engineering and Computer Science Advanced Electronic Devices Research Group(AEDRG) - Jang Lab. 1. Journal Articles

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