Graphene‐on‐Silicon Hybrid Field‐Effect Transistors

Abstract: The combination of graphene and silicon in hybrid electronic devices has attracted increasing attention over the last decade. Here, a unique technology of graphene‐on‐silicon heterostructures as solution‐gated transistors for bioelectronics applications is presented. The proposed graphene‐on‐silicon field‐effect transistors (GoSFETs) are fabricated by exploiting various conformations of channel doping and dimensions. The fabricated devices demonstrate hybrid behavior with features specific to both graphene and silicon, which are rationalized via a comprehensive physics‐based compact model which is purposely implemented and validated against measured data. The developed theory corroborates that the device hybrid behavior can be explained in terms of two independent silicon and graphene carrier transport channels, which are, however, strongly electrostatically coupled. Although GoSFET transconductance and carrier mobility are found to be lower than in conventional silicon or graphene field‐effect transistors, it is observed that the combination of both materials within the hybrid channel contributes uniquely to the electrical response. Specifically, it is found that the graphene sheet acts as a shield for the silicon channel, giving rise to a nonuniform potential distribution along it, which impacts the transport, especially at the subthreshold region, due to non‐negligible diffusion current.

Standort
Deutsche Nationalbibliothek Frankfurt am Main
Umfang
Online-Ressource
Sprache
Englisch

Erschienen in
Graphene‐on‐Silicon Hybrid Field‐Effect Transistors ; day:28 ; month:02 ; year:2023 ; extent:11
Advanced electronic materials ; (28.02.2023) (gesamt 11)

Urheber
Fomin, Mykola
Pasadas, Francisco.
Marin, Enrique G.
Medina‐Rull, Alberto
Ruiz, Francisco. G.
Godoy, Andrés.
Zadorozhnyi, Ihor
Beltramo, Guillermo
Brings, Fabian
Vitusevich, Svetlana
Offenhaeusser, Andreas
Kireev, Dmitry

DOI
10.1002/aelm.202201083
URN
urn:nbn:de:101:1-2023030114083595633173
Rechteinformation
Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
Letzte Aktualisierung
14.08.2025, 10:45 MESZ

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