Preparation of semiconducting block copolymers for controll of domain orientation

有机太阳能电池的转换效率很大程度上取决于复合材料的形态。本研究利用区域规则聚（3-己基噻吩）（P3HT）和电惰性聚合物组成嵌段共聚物，以控制相分离各畴的形态和取向。富勒烯衍生物嵌段共聚物复合材料的膜形态与惰性嵌段的性质密切相关。与P3HT/PCBM相比，P3HT-b-聚苯乙烯复合材料表现出明显且更大的结构域。另一方面，p3ht -b-聚环氧乙烷表现出较小尺寸的规则相分离结构。

The conversion efficiency of organic solar cells strongly depends on the morphology of the composites. In this study, in order to controll the morphology and the orientation of phase separated each domain, novel methodology utilizing block copolymers consisting of regioregular poly (3-hexylthiophene) (P3HT) and electrically inert polymer. The film morphology of the composites of block copolymers with fullerene derivative was strongly dependent on the nature of inert block. P3HT-b-polystyrene composite showed distinct and larger domain compared with P3HT/PCBM. On the other hand, P3HT-b-poly (ethylene oxide) showed smaller size of regular phase separated structure.