Sökning: WFRF:(Hinnemo Malkolm 1986 ) >
Interface Dependent...
Interface Dependent Effective Mobility in Graphene Field Effect Transistors
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- Ahlberg, Patrik, 1985- (författare)
- Uppsala universitet,Fasta tillståndets elektronik
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- Hinnemo, Malkolm, 1986- (författare)
- Uppsala universitet,Fasta tillståndets elektronik
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- Zhang, Shi-Li (författare)
- Uppsala universitet,Fasta tillståndets elektronik
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- Olsson, Jörgen, 1966- (författare)
- Uppsala universitet,Fasta tillståndets elektronik
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(creator_code:org_t)
- 2018-01-04
- 2018
- Engelska.
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Ingår i: Journal of Electronic Materials. - : Springer Science and Business Media LLC. - 0361-5235 .- 1543-186X. ; 47:3, s. 1757-1761
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- By pretreating the substrate of a graphene field-effect transistor (G-FET), a stable unipolar transfer characteristic, instead of the typical V-shape ambipolar behavior, has been demonstrated. This behavior is achieved through functionalization of the SiO2/Si substrate that changes the SiO2 surface from hydrophilic to hydrophobic, in combination with postdeposition of an Al2O3 film by atomic layer deposition (ALD). Consequently, the back-gated G-FET is found to have increased apparent hole mobility and suppressed apparent electron mobility. Furthermore, with addition of a top-gate electrode, the G-FET is in a double-gate configuration with independent top- or back-gate control. The observed difference in mobility is shown to also be dependent on the top-gate bias, with more pronounced effect at higher electric field. Thus, the combination of top and bottom gates allows control of the G-FET's electron and hole mobilities, i.e., of the transfer behavior. Based on these observations, it is proposed that polar ligands are introduced during the ALD step and, depending on their polarization, result in an apparent increase of the effective hole mobility and an apparent suppressed effective electron mobility.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)
Nyckelord
- Teknisk fysik med inriktning mot elektronik
- Engineering Science with specialization in Electronics
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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