End-on Chain Orientation of Poly(3-hexylthiophene)-Based Diblock Copolymers
발표자
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초록
내용
We synthesized poly(3-hexylthiophene)-block-poly(3-(2-methoxyethoxy)methylthiophene) copolymer (P3HT-b-P3MEGT) with a controlled regioregularity (RR) of P3HT. P3HT-b-P3MEGT with RR of P3HT having 82 % exhibited a well-ordered lamellar morphology induced by microphase separation. P3HT-b-P3MEGT thin films showed parallel oriented lamellar nanostructures to a silicon substrate due to a large difference of surface tension. Parallel oriented lamellar nanostructure induced end-on orientation of P3HT and P3MEGT chains, which enhances significantly the vertical hole mobility more than 30 times compared to edge-on oriented P3HT homopolymer thin films with high RR (95 %).