Electrical properties of graphene-metal contacts

Abstract The performance of devices and systems based on two-dimensional material systems depends critically on the quality of the contacts between 2D material and metal. A low contact resistance is an imperative requirement to consider graphene as a candidate material for electronic and optoelectro...

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Autores principales:	Teresa Cusati, Gianluca Fiori, Amit Gahoi, Vikram Passi, Max C. Lemme, Alessandro Fortunelli, Giuseppe Iannaccone
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/f364cb5bb5f24de48a177b91d043c90c
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spelling	oai:doaj.org-article:f364cb5bb5f24de48a177b91d043c90c2021-12-02T11:41:11ZElectrical properties of graphene-metal contacts10.1038/s41598-017-05069-72045-2322https://doaj.org/article/f364cb5bb5f24de48a177b91d043c90c2017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-05069-7https://doaj.org/toc/2045-2322Abstract The performance of devices and systems based on two-dimensional material systems depends critically on the quality of the contacts between 2D material and metal. A low contact resistance is an imperative requirement to consider graphene as a candidate material for electronic and optoelectronic devices. Unfortunately, measurements of contact resistance in the literature do not provide a consistent picture, due to limitations of current graphene technology, and to incomplete understanding of influencing factors. Here we show that the contact resistance is intrinsically dependent on graphene sheet resistance and on the chemistry of the graphene-metal interface. We present a physical model of the contacts based on ab-initio simulations and extensive experiments carried out on a large variety of samples with different graphene-metal contacts. Our model explains the spread in experimental results as due to uncontrolled graphene doping and suggests ways to engineer contact resistance. We also predict an achievable contact resistance of 30 Ω·μm for nickel electrodes, extremely promising for applications.Teresa CusatiGianluca FioriAmit GahoiVikram PassiMax C. LemmeAlessandro FortunelliGiuseppe IannacconeNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-11 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Teresa Cusati Gianluca Fiori Amit Gahoi Vikram Passi Max C. Lemme Alessandro Fortunelli Giuseppe Iannaccone Electrical properties of graphene-metal contacts
description	Abstract The performance of devices and systems based on two-dimensional material systems depends critically on the quality of the contacts between 2D material and metal. A low contact resistance is an imperative requirement to consider graphene as a candidate material for electronic and optoelectronic devices. Unfortunately, measurements of contact resistance in the literature do not provide a consistent picture, due to limitations of current graphene technology, and to incomplete understanding of influencing factors. Here we show that the contact resistance is intrinsically dependent on graphene sheet resistance and on the chemistry of the graphene-metal interface. We present a physical model of the contacts based on ab-initio simulations and extensive experiments carried out on a large variety of samples with different graphene-metal contacts. Our model explains the spread in experimental results as due to uncontrolled graphene doping and suggests ways to engineer contact resistance. We also predict an achievable contact resistance of 30 Ω·μm for nickel electrodes, extremely promising for applications.
format	article
author	Teresa Cusati Gianluca Fiori Amit Gahoi Vikram Passi Max C. Lemme Alessandro Fortunelli Giuseppe Iannaccone
author_facet	Teresa Cusati Gianluca Fiori Amit Gahoi Vikram Passi Max C. Lemme Alessandro Fortunelli Giuseppe Iannaccone
author_sort	Teresa Cusati
title	Electrical properties of graphene-metal contacts
title_short	Electrical properties of graphene-metal contacts
title_full	Electrical properties of graphene-metal contacts
title_fullStr	Electrical properties of graphene-metal contacts
title_full_unstemmed	Electrical properties of graphene-metal contacts
title_sort	electrical properties of graphene-metal contacts
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/f364cb5bb5f24de48a177b91d043c90c
work_keys_str_mv	AT teresacusati electricalpropertiesofgraphenemetalcontacts AT gianlucafiori electricalpropertiesofgraphenemetalcontacts AT amitgahoi electricalpropertiesofgraphenemetalcontacts AT vikrampassi electricalpropertiesofgraphenemetalcontacts AT maxclemme electricalpropertiesofgraphenemetalcontacts AT alessandrofortunelli electricalpropertiesofgraphenemetalcontacts AT giuseppeiannaccone electricalpropertiesofgraphenemetalcontacts
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Electrical properties of graphene-metal contacts

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