Structural and Electrical Investigation of C60-Graphene Vertical Heterostructures

Kwanpyo Kim, Tae Hoon Lee, Elton J.G. Santos, Pil Sung Jo, Alberto Salleo, Yoshio Nishi, Zhenan Bao

Research output: Contribution to journalArticle

100 Citations (Scopus)

Abstract

Graphene, with its unique electronic and structural qualities, has become an important playground for studying adsorption and assembly of various materials including organic molecules. Moreover, organic/graphene vertical structures assembled by van der Waals interaction have potential for multifunctional device applications. Here, we investigate structural and electrical properties of vertical heterostructures composed of C60 thin film on graphene. The assembled film structure of C60 on graphene is investigated using transmission electron microscopy, which reveals a uniform morphology of C60 film on graphene with a grain size as large as 500 nm. The strong epitaxial relations between C60 crystal and graphene lattice directions are found, and van der Waals ab initio calculations support the observed phenomena. Moreover, using C60-graphene heterostructures, we fabricate vertical graphene transistors incorporating n-type organic semiconducting materials with an on/off ratio above 3 × 103. Our work demonstrates that graphene can serve as an excellent substrate for assembly of molecules, and attained organic/graphene heterostructures have great potential for electronics applications.

Original languageEnglish
Pages (from-to)5922-5928
Number of pages7
JournalACS Nano
Volume9
Issue number6
DOIs
Publication statusPublished - 2015 Jun 23

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Structural and Electrical Investigation of C<sub>60</sub>-Graphene Vertical Heterostructures'. Together they form a unique fingerprint.

  • Cite this

    Kim, K., Lee, T. H., Santos, E. J. G., Jo, P. S., Salleo, A., Nishi, Y., & Bao, Z. (2015). Structural and Electrical Investigation of C60-Graphene Vertical Heterostructures. ACS Nano, 9(6), 5922-5928. https://doi.org/10.1021/acsnano.5b00581