Conjugated polymer-mediated polymorphism of a high performance, small-molecule organic semiconductor with tuned intermolecular interactions, enhanced long-range order, and charge transport

Jihua Chen, Ming Shao, Kai Xiao, Zhengran He, Dawen Li, Bradley S. Lokitz, Dale K. Hensley, S. Michael Kilbey, John E. Anthony, Jong K. Keum, Adam J. Rondinone, Wen Ya Lee, Sanghyun Hong, Zhenan Bao

Research output: Contribution to journalArticlepeer-review

74 Scopus citations

Abstract

We use 6,13-bis(triisopropylsilylethynyl)pentacene as a model small molecule organic semiconductor and two conjugated polymer additives to demonstrate conjugated polymer-mediated polymorphism of a small molecule organic semiconductor for the first time. The conjugated polymer additives, used with a slow solution crystallization approach, yield crystal structures that are not accessible by nonconjugated polymer additives and impart excellent long-range order. In both of the small molecule semiconductor/conjugated polymer blends studied here, previously unreported polymorphs of a small molecule semiconductor have been identified which also leads to improved charge transport in the absence of external alignment. These results open up a new exciting avenue to manipulate unit cell structure, long-range order, and charge transport of high performance, solution-processed, small molecule organic semiconductors.

Original languageEnglish
Pages (from-to)4378-4386
Number of pages9
JournalChemistry of Materials
Volume25
Issue number21
DOIs
StatePublished - Nov 12 2013

Keywords

  • charge transport
  • conjugated polymers
  • crystal structure
  • small molecule organic semiconductor
  • solution crystallization
  • thin film polymorphism

ASJC Scopus subject areas

  • General Chemistry
  • General Chemical Engineering
  • Materials Chemistry

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