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*
  • *Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

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

Bibliographical note

Funding Information:
This research was supported by National Research Foundation of Korea (NRF2012R1A2A1A01008797 & 20110026418) and by Key Research Institute Program through the NRF funded by the Ministry of Education, Science and Technology (NRF20100020209).

Keywords

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

ASJC Scopus subject areas

  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics

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