| 초록 |
In this study, we synthesized poly(3-dodecyl thiophene)-block-poly(3-(2-(2-(2-methoxyethoxy)ethoxy)ethoxy)methyl thiophene) copolymer (P3DDT-b-P3TEGT) using the GRIM method. The synthesized P3DDT-b-P3TEGT showed lamellar microdomains, confirmed by SAXS. The thin film morphology measured by AFM and GIWAXS showed parallel oriented lamellar microdomains. This is because of a large difference of surface tension between hydrophobic P3DDT and hydrophilic P3TEGT blocks. Thus, both P3DDT and P3TEGT backbone chains were oriented perpendicularly to the lamellar layer (namely, film thickness direction), and the end-on orientation of P3DDT and P3TEGT chains was obtained. P3DDT-b-P3TEGT film showed much improved hole mobility compared with neat P3DDT film in spite of presence of P3TEGT block with low hole mobility. This indicates that end-on orientation is very effective for improving the hole mobility along the vertical direction of the films. |
