Effect of Thickness of the Poly(vinyl alcohol) Passivation Layer on Ambipolar Characteristics of Graphene Field-effect Transistor

Norhakim, N. and Hawari, H.F. and Burhanudin, Z.A. (2022) Effect of Thickness of the Poly(vinyl alcohol) Passivation Layer on Ambipolar Characteristics of Graphene Field-effect Transistor. In: UNSPECIFIED.

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Abstract

Pristine graphene field-effect transistor (GFET) typically has an ambipolar transport characteristic. However, unintentional doping during fabrication and post-fabrication typically leads to p-doping of the graphene layer. This unintentional doping is further exacerbated when the GFET is operated in an ambient environment rich with oxygen and water molecules. In this work, the recovery of the ambipolar transport characteristics of the GFET by passivating the graphene with poly(vinyl alcohol) (PVA) is demonstrated. Two approaches were considered, i.e. drop casting and spin coating. It is found that the spin coating approach produces a rather uniform PVA film with thickness 0.83 μm. It can recover and further retain the ambipolar transport characteristics of GFET in ambient environments. By manipulating the number of ions in the PVA, it is believed that the characteristics could be prolonged making GFET more suitable for sensing in ambient environment. © 2022 IEEE.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Additional Information: cited By 0; Conference of 2022 International Conference on Future Trends in Smart Communities, ICFTSC 2022 ; Conference Date: 1 December 2022 Through 2 December 2022; Conference Code:186671
Uncontrolled Keywords: Coatings; Field effect transistors; Graphene transistors; Molecules; Passivation; Polyvinyl alcohols; Semiconductor doping, Ambients; Ambipolar; Ambipolar transport; Field-effect transistor; Graphene field-effect transistors; Poly (vinyl alcohol) (PVA); Poly(vinyl alcohol); Poly(vinyl alcohol) (PVA); PVA, Graphene
Depositing User: Mr Ahmad Suhairi UTP
Date Deposited: 19 Dec 2023 03:23
Last Modified: 19 Dec 2023 03:23
URI: https://khub.utp.edu.my/scholars/id/eprint/17252

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