Highly Conductive Semitransparent Graphene Circuits Screen-Printed from Water-Based Graphene Oxide Ink

Research output: Research - peer-reviewJournal article

DOI

  • Marc H. Overgaard
    Marc H. OvergaardKøbenhavns Universitet
  • Martin Kuhnel
    Martin KuhnelKøbenhavns Universitet
  • Rasmus Hvidsten
    Rasmus HvidstenKøbenhavns Universitet
  • Soren V. Petersen
    Soren V. Petersen
  • Tom Vosch
    Tom VoschKøbenhavns Universitet
  • Kasper Norgaard
    Kasper NorgaardKøbenhavns Universitet
  • Bo W. Laursen
    Bo W. LaursenKøbenhavns Universitet

The use of graphene materials as conductive inks for flexible and transparent electronics is promising, but challenged by the need for stabilizers, specialized organic solvents, and/or high temperature annealing, severely limiting performance or compatibility with substrates and printing techniques. Here, the development of a scalable water-based graphene oxide ink is reported that can be screen-printed on flexible plastic substrates and subsequently reduced using a 1: 1 mixture of trifluoroacetic acid and hydroiodic acid, thereby creating an electric circuit. The reduced prints exhibit low sheet resistance of 327 Omega sq(-1) for thin semitransparent layers with 37% transmittance. This methodology with postprinting chemical reduction outperforms high temperature annealing, thereby eliminating the need for such a step, which is incompatible with flexible plastic substrates. The strategy relies on low cost, industrially compatible chemicals and can be scaled up for low cost manufacture of roll-to-roll printed electronics.

Original languageEnglish
Article number1700011
JournalAdvanced materials technologies
Volume2
Issue number7
Number of pages7
ISSN2365-709X
DOIs
StatePublished - Jul 2017

    Research areas

  • flexible printed electronics, graphene, graphene oxide synthesis, screen-printing, ELECTRICAL-CONDUCTIVITY, THERMAL-STABILITY, NANOWIRE NETWORKS, GRAPHITE OXIDE, FILMS, TRANSPARENT, REDUCTION, ELECTRONICS, PATTERNS, POLYANILINE

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