Preparation of semiconducting block copolymers for controll of domain orientation

有机太阳能电池的转换效率强烈地依赖于复合材料的形貌。在本研究中，为了控制每个相区的形态和取向，利用区域规则聚(3-己基噻吩基)(P3HT)和电惰性聚合物组成的嵌段共聚物，提出了一种新的方法。嵌段共聚物与富勒烯衍生物的复合材料的膜形态强烈依赖于惰性嵌段的性质。与P3HT/PCBM相比，P3HT-b-聚苯乙烯复合材料显示出明显的、更大的微区。另一方面，P3HT-b-聚氧乙烷表现出较小的规则相分离结构尺寸。

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.