Naphthodithiophene-diketopyrrolopyrrole-based donor-acceptor alternating π-conjugated polymers for organic thin-film transistors

Tae Wan Lee, Dae Hee Lee, Jicheol Shin, Min Ju Cho, Dong Hoon Choi

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Novel naphtho[1,2-b:5,6-b′]dithiophene (NDT) and diketopyrrolopyrrole (DPP)-containing donor-acceptor conjugated polymers (PNDTDPPs) with different branched side chains were synthesized via Pd(0)-catalyzed Stille coupling reaction. Octyldodecyl (OD) and dodecylhexadecyl (DH) groups were tethered to the DPP units as the side chains. The soluble fraction of PNDTDPP-OD polymer in chloroform has much lower molecular weight than that of PNDTDPP-DH polymer. PNDTDPP-DH polymer bearing relatively longer DH side chains exhibited much better charge-transport behavior than PNDTDPP-OD polymer with shorter OD side chains. The thermally annealed PNDTDPP-DH polymer thin films exhibited an outstanding charge carrier mobility of ∼1.32 cm2 V-1 s-1 (Ion/Ioff ∼ 108) measured under ambient conditions, which is almost six times higher than that of thermally annealed PNDTDPP-OD polymer thin films.

Original languageEnglish
Pages (from-to)5280-5290
Number of pages11
JournalJournal of Polymer Science, Part A: Polymer Chemistry
Volume51
Issue number24
DOIs
Publication statusPublished - 2013 Dec 15

Keywords

  • charge transfer
  • conjugated polymers
  • copolymer
  • diketopyrrolopyrrole
  • films
  • naphtodithiophene
  • organic thin-film transistor
  • semiconductor
  • synthesis
  • thin films

ASJC Scopus subject areas

  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry

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