Fused Ring Cyclopentadithienothiophenes as Novel Building Blocks for High Field Effect Mobility Conjugated Polymers

Hongliang Zhong, Yang Han*, Jessica Shaw, Thomas Anthopoulos, Martin Heeney

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

A novel electron-rich cyclopentadithienothiophene (9H-thieno[3,2-b]thieno[2″,3″:4′,5′]thieno[2′,3′:3,4]cyclopenta[1,2-d]thiophene, CDTT) is reported by an optimized one-pot procedure involving two sequential lithiation/acylation steps. Three novel copolymers containing the varied electron-deficient acceptors 2,1,3-benzothiadiazole (BT), 5,6-difluoro-2,1,3-benzothiadiazole (DFBT) and naphtho[1,2-c:5,6-c]bis[1,2,5]-thiadiazole (NT) were prepared by Stille polymerization. These three polymers show promising charge transport properties in transistor devices, with PCDTT-BT exhibiting unipolar hole mobility up to 0.67 cm2 V-1 s-1 in top gate devices utilizing gold source drain electrodes. Changing to a bilayer electrode of Al/Au resulted in ambipolar transistor behavior, with PCDTT-DFBT exhibiting balanced hole and electron mobilities of 0.38 and 0.17 cm2 V-1 s-1 respectively. These results clearly demonstrate that CDTT is a promising new building block for conjugated polymers. (Graph Presented).

Original languageEnglish (US)
Pages (from-to)5605-5613
Number of pages9
JournalMacromolecules
Volume48
Issue number16
DOIs
StatePublished - Aug 25 2015

ASJC Scopus subject areas

  • Organic Chemistry
  • Materials Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry

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