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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.

SUBMITTER: de Moraes ACM 

PROVIDER: S-EPMC8201474 | biostudies-literature |

REPOSITORIES: biostudies-literature

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