Issue 43, 2020

Elucidating charge transport mechanisms in cellulose-stabilized graphene inks

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

Supplementary files

Article information

Article type
Communication
Submitted
13 jul 2020
Accepted
07 aug 2020
First published
07 aug 2020

J. Mater. Chem. C, 2020,8, 15086-15091

Author version available

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, 8, 15086 DOI: 10.1039/D0TC03309J

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