Impact of graphene polycrystallinity on the performance of graphene field-effect transistors

Autor(en)

David Jimenez, Aron W. Cummings, Ferney Chaves, Dinh Van Tuan, Jani Kotakoski, Stephan Roche

Abstrakt

We have used a multi-scale physics-based model to predict how the grain size and different grain boundary morphologies of polycrystalline graphene will impact the performance metrics of graphene field-effect transistors. We show that polycrystallinity has a negative impact on the transconductance, which translates to a severe degradation of the maximum and cutoff frequencies. On the other hand, polycrystallinity has a positive impact on current saturation, and a negligible effect on the intrinsic gain. These results reveal the complex role played by graphene grain boundaries and can be used to guide the further development and optimization of graphene-based electronic devices.

Organisation(en)

Physik Nanostrukturierter Materialien

Externe Organisation(en)

Universitat Autònoma de Barcelona , Catalan Institute of Nanoscience and Nanotechnology (ICN2), Institució Catalana de Recerca i Estudis Avançats (ICREA), University of Helsinki

Journal

Applied Physics Letters

Band

104

Anzahl der Seiten

4

ISSN

0003-6951

Publikationsdatum

01-2014

Peer-reviewed

Ja

ÖFOS 2012

1030 Physik, Astronomie, 103018 Materialphysik

Schlagwörter

ASJC Scopus Sachgebiete

Physics and Astronomy (miscellaneous)

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/7ebfbe23-2698-42e0-af7c-b3833211aa06