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Physical characterization of amorphous In-Ga-Zn-O thin-film transistors with direct-contact asymmetric graphene electrode

Title
Physical characterization of amorphous In-Ga-Zn-O thin-film transistors with direct-contact asymmetric graphene electrode
Authors
Jeong, J[Jeong, Jaewook]Kim, J[Kim, Joonwoo]Noh, HY[Noh, Hee-Yeon]Jeong, SM[Jeong, Soon Moon]Kim, JH[Kim, Jung-Hye]Myung, S[Myung, Sung]
DGIST Authors
Jeong, J[Jeong, Jaewook]; Kim, J[Kim, Joonwoo]; Noh, HY[Noh, Hee-Yeon]; Jeong, SM[Jeong, Soon Moon]; Kim, JH[Kim, Jung-Hye]
Issue Date
2014-09
Citation
AIP Advances, 4(9)
Type
Article
Article Type
Article
Keywords
Amorphous FilmsAsymmetric ElectrodesContact PropertiesElectro-Chemical ElectrodesElectrodesGrapheneGraphene ElectrodesGraphene TransistorsGraphite ElectrodesParasitic ResistancesPhysical CharacterizationSchottky Barrier DiodesSchottky BarriersSchottky CharacteristicsSemiconducting Indium CompoundsThin-Film Transistor (TFT)Thin-Film Transistors (TFTs)Thin-FilmsThin Film Circuits
ISSN
2158-3226
Abstract
High performance a-IGZO thin-film transistors (TFTs) are fabricated using an asymmetric graphene drain electrode structure. A-IGZO TFTs (channel length = 3 μm) were successfully demonstrated with a saturation field-effect mobility of 6.6 cm2/Vs without additional processes between the graphene and a-IGZO layer. The graphene/a-IGZO junction exhibits Schottky characteristics and the contact property is affected not only by the Schottky barrier but also by the parasitic resistance from the depletion region under the graphene electrode. Therefore, to utilize the graphene layer as S/D electrodes for a-IGZO TFTs, an asymmetric electrode is essential, which can be easily applied to the conventional pixel electrode structure. © 2014 Author(s).
URI
http://hdl.handle.net/20.500.11750/3046
DOI
10.1063/1.4895385
Publisher
American Institute of Physics Publishing
Related Researcher
Files:
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Collection:
Smart Textile Convergence Research Group1. Journal Articles
Division of Nano∙Energy Convergence Research1. Journal Articles


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