Nanostructured organic semiconductors via directed supramolecular assembly

Benjamin J. Rancatore, Clayton E. Mauldin, Shih Huang Tung, Cheng Wang, Alexander Hexemer, Joseph Strzalka, Jean Frechet, Ting Xu

Research output: Contribution to journalArticlepeer-review

78 Scopus citations

Abstract

Organic small molecule semiconductors have many advantages over their polymer analogues. However, to fabricate organic semiconductor-based devices using solution processing, it is requisite to eliminate dewetting to ensure film uniformity and desirable to assemble nanoscopic features with tailored macroscopic alignment without compromising their electronic properties. To this end, we present a modular supramolecular approach. A quaterthiophene organic semiconductor is attached to the side chains of poly(4-vinylpyridine) via noncovalent hydrogen bonds to form supramolecular assemblies that act as p-type semiconductors in field-effect transistors. In thin films, the quaterthiophenes can be readily assembled into microdomains, tens of nanometers in size, oriented normal to the surface. The supramolecules exhibited the same field-effect mobilities as that of the quaterthiophene alone (10-4 cm 2/(V·s)). Since the organic semiconductors can be readily substituted, this modular supramolecular approach is a viable method for the fabrication of functional, nanostructured organic semiconductor films using solution processing.

Original languageEnglish (US)
Pages (from-to)2721-2729
Number of pages9
JournalACS Nano
Volume4
Issue number5
DOIs
StatePublished - May 25 2010

Keywords

  • Charge mobility
  • Organic semiconductor
  • Supramolecular assembly
  • Thin film

ASJC Scopus subject areas

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

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