Electrical Transport in Devices Based on Edge-Fluorinated Graphene

Kolesnik-Gray M, Sysoev VI, Gollwitzer S, Pinakov DV, Chekhova GN, Bulusheva LG, Okotrub AV, Krstic V (2018)

Publication Status: Published

Publication Type: Journal article, Original article

Publication year: 2018

Journal

Advanced Electronic Materials Wiley

Publisher: Blackwell Publishing Ltd

DOI: 10.1002/aelm.201800073

Abstract

The conductivity of few- and monolayer graphene with covalently bound moieties is a key-point in the potential application of these materials in any electrical and optoelectronic device. In particular, fluorination of such graphene-based systems is of interest, as fluorine is expected to have a strong influence on the charge-carrier density due to its high electronegativity, and therefore modify the electrical transport properties significantly. Here it is shown that, depending on the device architecture, the electrical properties of fluorinated graphene-based devices are significantly different. It is found that the conductivity of thin films of few-layer graphene decreases by several orders of magnitude with fluorine content increasing from 2.4 to 16.6 at%, whereas individual flakes show a significant increase in both conductivity and charge carrier mobility. This observation, combined with Raman microscopy study, points toward the fact that the edges of the flakes are primary sites for fluorine within the experimental range of fluorine content. The strong decrease in conductivity in the film devices is therefore associated with the high contact resistance between the fluorine saturated edges of the individual flakes.

Authors with CRIS profile

Maria Kolesnik-Gray Chair of Applied Physics Stefan Gollwitzer Chair of Applied Physics Vojislav Krstic Professur für Angewandte Physik

Involved external institutions

Nikolaev Institute of Inorganic Chemistry RU Russian Federation (RU)

How to cite

APA:

Kolesnik-Gray, M., Sysoev, V.I., Gollwitzer, S., Pinakov, D.V., Chekhova, G.N., Bulusheva, L.G.,... Krstic, V. (2018). Electrical Transport in Devices Based on Edge-Fluorinated Graphene. Advanced Electronic Materials. https://doi.org/10.1002/aelm.201800073

MLA:

Kolesnik-Gray, Maria, et al. "Electrical Transport in Devices Based on Edge-Fluorinated Graphene." Advanced Electronic Materials (2018).

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