Thienothiophene-benzotriazole-based semicrystalline linear copolymers for organic field effect transistors

Seungjib Yum, Tae Kyu An, Xiaowei Wang, Mohammad Afsar Uddin, Thanh Luan Nguyen, Shuhao Xu, Hwasook Ryu, Yu Jin Kim, Sungu Hwang, Chan Eon Park, Han Young Woo

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9 Citations (Scopus)


A series of thienothiophene-benzotriazole-based semicrystalline copolymers, PTTBTz, PTTBTz- F, and PTTBTz-OR, were synthesized by considering chain linearity, planarity and inter-chain packing by virtue of non-covalent attractive interaction. Fluorine and alkoxy substituents were introduced to modulate the intra- and inter-chain coulombic interactions and crystalline ordering. The fluorine and alkoxy-substituted PTTBTz-F and PTTBTz-OR showed pronounced inter-chain packing with edge-on orientation confirmed by UV-vs absorption and X-ray diffraction measurements. The well-resolved diffraction patterns were obtained for PTTBTz-F and PTTBTz-OR, showing (100)∼(500) inter-lamellar scattering peaks (d-spacing, 17∼18 Å) in the out-of-plane direction and a π-π stacking peak (d-spacing, 3.5∼4.1 Å) in the in-plane direction. Organic field effect transistor (OFET) devices were fabricated with a bottom gate and top contact geometry. PTTBTz-F (μh =4.49 ×10-2cm2 V-1 s-1, on/off ratio =1.13 ×107) and PTTBTz-OR (μh =8.39 ×10-3 cm2 V-1 s-1, on/off ratio =2.98 ×104) showed nearly 3 and 2 orders of magnitude higher hole mobility upon annealing at 305 and 260 °C, with compared to the unsubstituted PTTBTz.

Original languageEnglish
Pages (from-to)1293-1302
Number of pages10
JournalPure and Applied Chemistry
Issue number8
Publication statusPublished - 2014 Aug 20
Externally publishedYes


  • ICFPAM-2013
  • Optoelectronics
  • Organic field-effect transistors
  • Semiconductors
  • X-ray diffraction

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)


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