Abstract The synthesis of 4,4ʹ-difluoro-2,2ʹ-bithiophene is reported and an alternating donor-acceptor copolymer of this moiety and diketopyrrolopyrrole has been prepared. This polymer has a lower highest occupied molecular orbital than its non-fluorinated analogue polymer. Organic thin film transistors based on this polymer showed p-type charge transport behavior and a hole mobility of 0.21 cm2 V−1 s−1 in bottom-gate bottom-contact devices. Organic solar cells using this polymer as donor and [6,6]-Phenyl-C71-butyric acid methyl ester as acceptor achieved a power conversion efficiency of 3.4% with a high fill factor of 69%. Our morphology analysis showed that there was a lack of long-range ordered structure in the neat polymer thin film, which could cause the inferior device performance.

中文翻译：

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基于 4,4'-二氟-2,2'-联噻吩的二酮吡咯并吡咯共轭聚合物，用于有机薄膜晶体管和有机光伏

摘要 报道了 4,4′-二氟-2,2′-联噻吩的合成，并制备了该部分和二酮吡咯并吡咯的交替供体-受体共聚物。该聚合物的最高占据分子轨道低于其非氟化类似聚合物。基于这种聚合物的有机薄膜晶体管在底栅底接触器件中显示出 p 型电荷传输行为和 0.21 cm2 V-1 s-1 的空穴迁移率。使用这种聚合物作为供体和 [6,6]-苯基-C71-丁酸甲酯作为受体的有机太阳能电池实现了 3.4% 的功率转换效率和 69% 的高填充因子。我们的形态分析表明，纯聚合物薄膜中缺乏长程有序结构，这可能导致器件性能较差。