화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.86, 150-157, June, 2020
DOI10.1016/j.jiec.2020.02.022  Export Citation
Synthetic strategy for thienothiophene-benzotriazole-based polymers with high backbone planarity and solubility for field-effect transistor applications
Yohan Jo1, Jong Gyu Oh2, Cheulhwan Kim1, Tae Kyu An1, 3, †, Jaeyoung Jang2, †, and Jihoon Lee1, 3, †
  • 1Department of IT Convergence, Korea National University of Transportation, Chungju 27469, Republic of Korea
  • 2Department of Energy Engineering, Hanyang University, Seoul 04763, Republic of Korea
  • 3Department of Polymer Science & Engineering, Korea National University of Transportation, 50 Daehak-Ro, Chungju 27469, Republic of Korea
E-mail:, ,
We report on a synthetic strategy for a series of thienothiophene-benzotriazole-based polymers.octyl- PTTBTz-F, Si-PTTBTz, and Si-PTTBTz-F.wherein conformational locks are introduced to induce intra- and intermolecular interactions (F…S, F…H-C, and C-F…πF) for high backbone planarity and siloxane- terminated side chains are introduced to increase solubility. The three polymers were utilized as active layers in organic field-effect transistors, and the effects of thermal annealing on the polymer crystallinity and device performances were studied. Although the fluorine-atom-substituted octyl-PTTBTz-F showed a moderate hole mobility of up to 4.2 X 10-3cm2 V-1 s-1 with enhanced molecular orientation because of conformational locks, it had poor solubility in common organic solvents. The Si-PTTBTz polymer with the siloxane-terminated side chains showed good solubility but inferior device performance with a hole mobility of up to 2.2 X 10-4cm2 V-1 s-1. The rationally designed Si-PTTBTz-F polymer, which contains both fluorine atoms in the backbone and siloxane-terminated groups in the side chains, showed an excellent hole mobility of up to 0.11 cm2 V-1 s-1 and good solubility in common organic solvents.
Keywords:Organic field-effect transistor (OFET);Siloxane-terminated side chain;Thienothiophene;Benzotriazole;Conformational locking;Solubility
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