目前，考虑到有机太阳能电池材料工业化用量，相较于合成复杂的聚合物给体，简单的均聚物聚（3-己基噻吩）（P3HT）是最好的选择之一。因为P3HT是唯一产量超过10kg以上的聚合物，已经应用到大面积印刷太阳能电池中。但是由于P3HT对与之共混能形成良好形貌的非富勒烯小分子具有很强的选择性，导致P3HT与非富勒烯小分子制备的电池的最高效率（8.25%）与其它类型的电池相比还较低。因此需要合成更多与P3HT匹配的小分子来提高电池的性能，为P3HT电池的工业化提供高效的受体材料。在P3HT电池中，唯一一种以吐昔烯为中心核的小分子获得最好效率，但是它的短路电流（13.04 mA·cm-2）还有很大的提升空间。本项目对以吐昔烯及其衍生物为核心的小分子进行设计合成，系统地研究此类物质结构与性能的关系，通过增加中心核的平面性与共轭体系，改变桥联单元与端基调节光电性能，提升P3HT电池的短路电流与效率。

Now, considering the industrial usage of materials for organic solar cell, simple homopolymer poly (3-hexylthiophene) (P3HT) is one of the best choices compared to the polymer donors with complex synthesis. Because P3HT is the only polymer with an output of more than 10kg, it has been applied to large-area printed solar cells. However, P3HT has a strong selectivity for non-fullerene small molecules blended with to form a good morphology, resulting in the highest efficiency (8.25%) of solar cell based P3HT and non-fullerene small molecules lower than that of other types. Therefore, it is necessary to synthesize more small molecules matching P3HT to improve the performance of solar cell, and to provide efficient acceptor materials for the industrialization of P3HT-based solar cell. In P3HT-based solar cell, the only small molecule with truxene as core achieves the best efficiency, but the short circuit current (13.04 mA·cm-2) still has a lot of room for improvement. This project designs and synthesizes small molecules with truxene and its derivatives as core, systematically studies the relationship between the structures and properties, improve short circuit current and efficiency of P3HT-based solar cell by increasing the planarity and conjugated system of the core, changing the bridge-unit and end-group to adjust the photoelectric performance.