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Elucidating charge transport mechanisms in cellulose-stabilized graphene inks

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Abstract

Solution-processed graphene inks that use ethyl cellulose as a polymer stabilizer are blade-coated into large-area thin films. Following blade-coating, the graphene thin films are cured to pyrolyze the cellulosic polymer, leaving behind an sp2-rich amorphous carbon residue that serves as a binder in addition to facilitating charge transport between graphene flakes. Systematic charge transport measurements, including temperature-dependent Hall effect and non-contact microwave resonant cavity characterization, reveal that the resulting electrically percolating graphene thin films possess high mobility (≈160 cm2 V−1 s−1), low energy gap, and thermally activated charge transport, which develop weak localization behavior at cryogenic temperatures.

Graphical abstract: Elucidating charge transport mechanisms in cellulose-stabilized graphene inks

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Supplementary files

Article information


Submitted
13 Jul 2020
Accepted
07 Aug 2020
First published
07 Aug 2020

J. Mater. Chem. C, 2020, Advance Article
Article type
Communication

Elucidating charge transport mechanisms in cellulose-stabilized graphene inks

A. C. M. de Moraes, J. Obrzut, V. K. Sangwan, J. R. Downing, L. E. Chaney, D. K. Patel, R. E. Elmquist and M. C. Hersam, J. Mater. Chem. C, 2020, Advance Article , DOI: 10.1039/D0TC03309J

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