Small band gap polymers incorporating a strong acceptor, thieno[3,2-b]thiophene-2,5-dione, with p-channel and ambipolar charge transport characteristics

Itaru Osaka, Toru Abe, Hiroki Mori, Masahiko Saito, Noriko Takemura, Tomoyuki Koganezawa, Kazuo Takimiya

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

We present new donor-acceptor semiconducting polymers based on a strong acceptor unit, thieno[3,2-b]thiophene-2,5-dione (TTD). The polymers exhibit a deep LUMO energy level of around -4 eV while preserving a relatively low-lying HOMO energy level of below -5 eV and a quite small optical band gap of 1.2 eV. Interestingly, bottom-gate-top-contact transistor devices based on the polymers demonstrate p-channel behavior with high hole-mobilites of 1.38 cm2 V-1 s-1, whereas top-gate-bottom-contact devices show ambipolar behavior with hole and electron mobilities of ∼0.12 and ∼0.20 cm2 V-1 s-1, respectively. These results indicate the great potential of TTD to be used as the building unit for high-performance semiconducting polymers.

Original languageEnglish
Pages (from-to)2307-2312
Number of pages6
JournalJournal of Materials Chemistry C
Volume2
Issue number13
DOIs
Publication statusPublished - Apr 7 2014
Externally publishedYes

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Semiconducting polymers
Thiophenes
Thiophene
Electron energy levels
Charge transfer
Polymers
Energy gap
Hole mobility
Electron mobility
Optical band gaps
Transistors

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Chemistry

Cite this

Small band gap polymers incorporating a strong acceptor, thieno[3,2-b]thiophene-2,5-dione, with p-channel and ambipolar charge transport characteristics. / Osaka, Itaru; Abe, Toru; Mori, Hiroki; Saito, Masahiko; Takemura, Noriko; Koganezawa, Tomoyuki; Takimiya, Kazuo.

In: Journal of Materials Chemistry C, Vol. 2, No. 13, 07.04.2014, p. 2307-2312.

Research output: Contribution to journalArticle

Osaka, Itaru ; Abe, Toru ; Mori, Hiroki ; Saito, Masahiko ; Takemura, Noriko ; Koganezawa, Tomoyuki ; Takimiya, Kazuo. / Small band gap polymers incorporating a strong acceptor, thieno[3,2-b]thiophene-2,5-dione, with p-channel and ambipolar charge transport characteristics. In: Journal of Materials Chemistry C. 2014 ; Vol. 2, No. 13. pp. 2307-2312.
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AU - Mori, Hiroki

AU - Saito, Masahiko

AU - Takemura, Noriko

AU - Koganezawa, Tomoyuki

AU - Takimiya, Kazuo

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