• 文献标题:   Elucidating charge transport mechanisms in cellulose-stabilized graphene inks
  • 文献类型:   Article
  • 作  者:   DE MORAES ACM, OBRZUT J, SANGWAN VK, DOWNING JR, CHANEY LE, PATEL DK, ELMQUIST RE, HERSAM MC
  • 作者关键词:  
  • 出版物名称:   JOURNAL OF MATERIALS CHEMISTRY C
  • ISSN:   2050-7526 EI 2050-7534
  • 通讯作者地址:   Northwestern Univ
  • 被引频次:   0
  • DOI:   10.1039/d0tc03309j
  • 出版年:   2020

▎ 摘  要

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 sp(2)-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 (approximate to 160 cm(2) V-1 s(-1)), low energy gap, and thermally activated charge transport, which develop weak localization behavior at cryogenic temperatures.