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Effects of graphene thickness on the electrical properties of carbon nanotube field effect transistors with graphene contacts

Authors :
Shigeru Kishimoto
Takashi Mizutani
Masato Tamaoki
Source :
Applied Physics Letters. 103:033120
Publication Year :
2013
Publisher :
AIP Publishing, 2013.

Abstract

We have studied the effects of the thickness of the graphene on the current-voltage characteristics of the carbon nanotube field effect transistors (CNT-FETs) with graphene contacts. It was shown that the CNT-FETs with thin graphene contacts showed larger drain ON current and transconductance than those of the devices with the thick graphene contacts. The result was explained by the inter-graphene resistance which dominates the contact resistance of the CNT-FETs with the graphene contacts. The inter-graphene resistance was estimated to be 2.2 Ω · cm2 from the extrinsic transconductance of the devices.

Details

ISSN :
10773118 and 00036951
Volume :
103
Database :
OpenAIRE
Journal :
Applied Physics Letters
Accession number :
edsair.doi...........7ede3f055875d53e7f4d04f79b8c6303