| 초록 |
Regioregular poly(3-hexylthiophene) (P3HT) readily self-assembles to form a well-ordered two-dimensional lamellar structure that displays an excellent charge carrier mobility (up to ~0.1 cm2 V–1s–1). However the hole mobility in P3HT is much lower in a blend system (10–6 cm2 V–1s–1) than in the pure P3HT material. The hole mobility may be increased by optimizing the morphology of a bulk heterojunction thin film active layer by, for instance, applying thermal annealing, solvent annealing, thermal treatment under an electric field, or microwaving annealing. These treatments induce the formation of a continuously interpenetrating matrix of donor and acceptor domains with a high P3HT crystallinity, enhanced charge transport properties, and a high current density. Here, we suggested a novel approach to enhancing the crystallinity of P3HT in a P3HT:PCBM blend via self-assembly promoted by a thiophene-based all-conjugated amphiphilic block copolymer. |
