Atomically Smooth Graphene-Based Hybrid Template for the Epitaxial Growth of Organic Semiconductor Crystals

Nguyen Ngan Nguyen, Hyo Chan Lee, Kangkyun Baek, Min Seok Yoo, Hansol Lee, Hyungsub Lim, Shinyoung Choi, Cheol Joo Kim, Sung Woo Nam, Kilwon Cho

Research output: Contribution to journalArticlepeer-review

Abstract

Atomically thin 2D materials are good templates to grow organic semiconductor thin films with desirable features. However, the 2D materials typically exhibit surface roughness and spatial charge inhomogeneity due to nonuniform doping, which can affect the uniform assembly of organic thin films on the 2D materials. A hybrid template is presented for preparation of highly crystalline small-molecule organic semiconductor thin film that is fabricated by transferring graphene onto a highly ordered self-assembled monolayer. This hybrid graphene template has low surface roughness and spatially uniform doping, and it yields highly crystalline fullerene thin films with grain sizes >300 nm, which is the largest reported grain size for C60 thin films on 2D materials. A graphene/fullerene/pentacene phototransistor fabricated directly on the hybrid template has five times higher photoresponsivity than a phototransistor fabricated on a conventional graphene template supported by a SiO2 wafer.

Original languageEnglish (US)
Article number2008813
JournalAdvanced Functional Materials
Volume31
Issue number11
DOIs
StatePublished - Mar 10 2021

Keywords

  • C
  • graphene
  • growth templates
  • organic optoelectronics
  • organic semiconductors

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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