| 초록 |
Organic field-effect transistors(OFETs) have attracted much attention because of their possible applications to low-cost integrated circuits and flexible displays. The use of vapor-deposited oligomers in OFETs possesses advantages, good performance and easy purification. However, because the vapor-deposition processing is expensive, we synthesized a family of bis(bithiazole)vinylene that could be solution-processable. The thiazole units lowered the LUMO levels by enhancing the electron-withdrawing properties, which are useful in reducing the threshold voltage of the OFET device. Also, the thiazole units were expected to increase the intermolecular interactions by the formation of good π-π stacking as well as heteroatom contacts. Vinylene groups reduced steric hindrance and also made a coplanar structure. NMR, FT-IR spectroscopy, optical spectroscopy, thermal analysis, cyclic voltammetry, X-ray diffraction were employed for characterization of the synthesized oligomers. |
