2,5-Bis(2-octyldodecyl)pyrrolo[3,4-c]pyrrole-1,4-(2H,5H)-dione-based donor-acceptor alternating copolymer bearing Benzothieno[3,2-b] benzothiophene as an organic semiconductor and its application to thin film transistors

Ji Ho Kim, Kyung Hwan Kim, Dae Hee Lee, Da Seul Yang, Dong Uk Heo, Tae Wan Lee, Min Ju Cho, Dong Hoon Choi

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

New diketopyrrolopyrrole (DPP)-containing conjugated polymer such poly (benzothieno[3,2-b]benzothiophene-2,5-bis(2-octyldodecyl)-6-(thiophen-2-yl) pyrrolo [3,4-c]pyrrole-1,4(2H,5H)-dione) was successfully synthesized via Horner-Emmons condensation. The polymer showed a low bandgap energy (Eg = 1.56 eV) in a film state. The polymer also exhibits good solubility in common organic solvents and good self-film-forming properties. The semiconducting properties of the polymer synthesized herein were evaluated in organic thin film transistors (OTFTs). The polymer exhibits charge carrier mobilities as high as 3.0 × 10-3 cm2V-1s-1 (I on/off = 105) after thermal annealing at 200°C for 10 min, which is three times higher than that of thin film transistor made of the pristine film.

Original languageEnglish
Pages (from-to)38-44
Number of pages7
JournalMolecular Crystals and Liquid Crystals
Volume581
Issue number1
DOIs
Publication statusPublished - 2013 Jan 1

Keywords

  • Benzothienobenzothiophene
  • conjugated polymer
  • diketopyrrolopyrrole
  • mobility
  • organic thin film transistor
  • semiconductor

ASJC Scopus subject areas

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

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