Luminescence, charge mobility, and optical waveguiding of two-dimensional organic rubrene nanosheets: Comparison with one-dimensional nanorods

Jin Woo Lee, Kihyun Kim, Jin Sun Jung, Seong Gi Jo, Hyo Min Kim, Hyun Soo Lee, Jeongyong Kim, Jinsoo Joo

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

Intrinsic characteristics of organic and inorganic nanostructures depend on their physical dimensions (i.e., size and shape) and crystallinity. Here, we compared the nanoscale optical and electrical properties of organic rubrene one-dimensional (1-D) nanorods (NRs) and two-dimensional (2-D) nanosheets (NSs). From high-resolution laser confocal microscope photoluminescence (PL) measurements, the light-emission characteristics of 2-D rubrene NSs varied with the crystalline domain direction, indicating intrinsic PL anisotropy, which was distinguishable from 1-D rubrene single NRs, because of anisotropy π-π stacking molecular arrangements. We also observed the variation of charge carrier mobility depending on the measured directions (i.e., anisotropy of charge transport) in rubrene NS-based field-effect transistors. The optical waveguiding properties of rubrene nanostructures were strongly correlated to the dimensionality of materials and PL anisotropy.

Original languageEnglish
Pages (from-to)2047-2055
Number of pages9
JournalOrganic Electronics
Volume13
Issue number10
DOIs
Publication statusPublished - 2012 Oct

Keywords

  • Mobility
  • Nanorod
  • Nanosheet
  • Optical waveguide
  • Photoluminescence
  • Rubrene

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry
  • Electrical and Electronic Engineering

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