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High mobility graph...
High mobility graphene field effect transistors on flexible EVA/PET foils
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- Khan, Munis, 1991 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Ji, Jie (author)
- Danmarks Tekniske Universitet,Technical University of Denmark
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- Zhou, Binbin (author)
- Danmarks Tekniske Universitet,Technical University of Denmark
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- Jepsen, Peter U. (author)
- Danmarks Tekniske Universitet,Technical University of Denmark
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- Boggild, Peter (author)
- Danmarks Tekniske Universitet,Technical University of Denmark
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- Yurgens, Avgust, 1959 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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(creator_code:org_t)
- 2024
- 2024
- English.
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In: 2D Materials. - 2053-1583. ; 11:3
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https://research.cha... (primary) (free)
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https://research.cha...
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https://doi.org/10.1...
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Abstract
Subject headings
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- Monolayer graphene is a promising material for a wide range of applications, including sensors, optoelectronics, antennas, EMR shielding, flexible electronics, and conducting electrodes. Chemical vapor deposition (CVD) of carbon atoms on a metal catalyst is the most scalable and cost-efficient method for synthesizing high-quality, large-area monolayer graphene. The usual method of transferring the CVD graphene from the catalyst to a target substrate involves a polymer carrier which is dissolved after the transfer process is completed. Due to often unavoidable damage to graphene, as well as contamination and residues, carrier mobilities are typically 1000–3000 cm2(Vs)−1, unless complex and elaborate measures are taken. Here, we report on a simple scalable fabrication method for flexible graphene field-effect transistors that eliminates the polymer interim carrier, by laminating the graphene directly onto office lamination foils, removing the catalyst, and depositing Parylene N as a gate dielectric and encapsulation layer. The fabricated transistors show field- and Hall-effect mobilities of 7000–10 000 cm2(Vs)−1 with a residual charge-carrier density of 2×1011 1 cm−2 at room temperature. We further validate the material quality by terahertz time-domain spectroscopy and observation of the quantum Hall effect at low temperatures in a moderate magnetic field of ∼5 T. The Parylene encapsulation provides long-term stability and protection against additional lithography steps, enabling vertical device integration in multilayer electronics on a flexible platform.
Subject headings
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Keyword
- flexible substrates
- CVD
- field-effect transistor
- graphene
Publication and Content Type
- art (subject category)
- ref (subject category)
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