Elucidating charge transport mechanisms in cellulose-stabilized graphene inks

Ana C.M. De Moraes, Jan Obrzut, Vinod K. Sangwan, Julia R. Downing, Lindsay E. Chaney, Dinesh K. Patel, Randolph E. Elmquist, Mark C. Hersam*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

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. This journal is

Original languageEnglish (US)
Pages (from-to)15086-15091
Number of pages6
JournalJournal of Materials Chemistry C
Volume8
Issue number43
DOIs
StatePublished - Nov 21 2020

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Chemistry

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