화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Macromolecular Research, Vol.24, No.12, 1077-1083, December, 2016
DOI10.1007/s13233-016-4156-8  Export Citation
Synthesis of Thiophene-based Polymeric Semiconductor with High Aromatic Density and Its Application in Organic Thin-Film Transistors
Sun Cheng, Seongwon Yoon1, Dae Sung Chung1, Yun-Hi Kim, Tae Kyu An2, †, and Soon-Ki Kwon3, †
  • Department of Chemistry and RINS, Gyeongsang National University, Jinju, Gyeongnam 52828, Korea
  • 1School of Chemical Engineering and Material Science, Chung-Ang University, Seoul 06911, Korea
  • 2Department of Polymer Science & Engineering, Korea National University of Transportation, 50 Daehak-Ro, Chungju, Chungbuk 27469, Korea
  • 3Department of Materials Engineering and Convergence Technology & ERI, Gyeongsang National University, Jinju, Gyeongnam 52828, Korea
E-mail:,
A new p-type polymer, poly(3,3'''''-didodecyl sexythiophene) (PST), was synthesized via FeCl3 oxidative coupling reaction. The mole ratio of FeCl3 and monomer (4:1), and keeping room temperature for polymerization were very important to obtain soluble polymer with regulated molecular weight. The photoluminescence (PL) maxima of the polymer are found at 500 and 562 nm for the solution and at 656 nm for the film. The low density of side chains enables substantial torsional deviations of the thienylene units, thereby inducing a relatively low highest occupied molecular orbital (HOMO) level (~ -5.22 eV). X-Ray diffraction analysis showed that PST forms a highly interdigitated structure due to the low density of side chains. PST were introduced as the active layers of organic thin-film transistors, and the resulting device showed field-effect mobilities of 0.12 cm2/Vs (on/off ratio=1.7×105) in air. The intrinsic mobility of PST measured by using the time of flight technique also supports a high conductance of 4×10-4 cm2/Vs.
Keywords:organic field-effect transistor (OFET);polymeric semiconductor;organic semiconductor;thiophene-based polymer
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