Graphene Ink as a Conductive Templating Interlayer for Enhanced Charge Transport of C60-Based Devices

D. Leonardo Gonzalez Arellano*, Hyunbok Lee, Ethan B. Secor, Edmund K. Burnett, Mark C. Hersam, James J. Watkins, Alejandro L. Briseno

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

We demonstrate conductive templating interlayers of graphene ink, integrating the electronic and chemical properties of graphene in a solution-based process relevant for scalable manufacturing. Thin films of graphene ink are coated onto ITO, following thermal annealing, to form a percolating network used as interlayer. We employ a benchmark n-type semiconductor, C60, to study the interface of the active layer/interlayer. On bare ITO, C60 molecules form films of homogeneously distributed grains; with a graphene interlayer, a preferential orientation of C60 molecules is observed in the individual graphene plates. This leads to crystal growth favoring enhanced charge transport. We fabricate devices to characterize the electron injection and the effect of graphene on the device performance. We observe a significant increase in the current density with the interlayer. Current densities as high as 1 mA/cm2 and 70 mA/cm2 are realized for C60 deposited with the substrate at 25 °C and 150 °C, respectively.

Original languageEnglish (US)
Pages (from-to)29594-29599
Number of pages6
JournalACS Applied Materials and Interfaces
Volume8
Issue number43
DOIs
StatePublished - Nov 2 2016

Keywords

  • C
  • crystallization
  • graphene
  • solution-processed
  • templating-interlayer

ASJC Scopus subject areas

  • Materials Science(all)

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