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Stabilizing a graphene platform toward discrete components

Accepted version
Peer-reviewed

Type

Article

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Authors

Mzali, S 
Montanaro, A 
Xavier, S 
Servet, B 
Mazellier, JP 

Abstract

© 2016 Author(s).We report on statistical analysis and consistency of electrical performances of devices based on a large scale passivated graphene platform. More than 500 graphene field effect transistors (GFETs) based on graphene grown by chemical vapor deposition and transferred on 4 in. SiO2/Si substrates were fabricated and tested. We characterized the potential of a two-step encapsulation process including an Al2O3 protection layer to avoid graphene contamination during the lithographic process followed by a final Al2O3 passivation layer subsequent to the GFET fabrication. Devices were investigated for occurrence and reproducibility of conductance minimum related to the Dirac point. While no conductance minimum was observed in unpassivated devices, 75% of the passivated transistors exhibited a clear conductance minimum and low hysteresis. The maximum of the device number distribution corresponds to a residual doping below 5 × 1011 cm−2 (0.023 V/nm). This yield shows that GFETs integrating low-doped graphene and exhibiting small hysteresis in the transfer characteristics can be envisaged for discrete components, with even further potential for low power driven electronics.

Description

Keywords

51 Physical Sciences, 40 Engineering, 4018 Nanotechnology, 5104 Condensed Matter Physics

Journal Title

Applied Physics Letters

Conference Name

Journal ISSN

0003-6951
1077-3118

Volume Title

109

Publisher

AIP Publishing
Sponsorship
Engineering and Physical Sciences Research Council (EP/K016636/1)
European Commission (285275)
European Commission (604391)
European Commission Horizon 2020 (H2020) Future and Emerging Technologies (FET) (696656)
This study was partly funded by the European Union through the projects Grafol (No. 285275) and Graphene Flagship (No. 604391 and Core1 No. 696656).