Li Manman, Qin Yuancheng, Dai Weili, Luo Xubiao
Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University Nanchang 330063 PR China
RSC Adv. 2018 Jan 19;8(7):3809-3815. doi: 10.1039/c7ra11297a. eCollection 2018 Jan 16.
We report here the synthesis and characterizations of a novel series of acceptor copolymers with a broad absorption band. The acceptor polymers were synthesized as a copolymer of perylenediimide (PDI) and naphthalene imide (NDI) along with dithieno[3,2-:2',3'-]silole (DTS) and -alkyl dithieno[3,2-:2',3-]pyrroles (DTP). When the dipole moment and polarizability of the acceptor polymer are compared, it is observed that when the dipole moment decreases, the polarizability becomes larger. The polarizability of polymers containing PDI is significantly greater than those containing NDI, and their polarizability change is in accordance with the change in the transient fluorescence lifetime. It was also found that the power conversion efficiency of the non-fullerene solar cell was strongly correlated to polarizability. The results demonstrate that the polarizability can be utilized to screen novel donor and acceptor polymers for the design and synthesis of high-performance solar cells.
我们在此报告了一系列具有宽吸收带的新型受体共聚物的合成与表征。这些受体聚合物是作为苝二酰亚胺（PDI）和萘酰亚胺（NDI）与二噻吩并[3,2 - b:2',3'- d]硅杂环戊二烯（DTS）和 - 烷基二噻吩并[3,2 - b:2',3'- d]吡咯（DTP）的共聚物合成的。当比较受体聚合物的偶极矩和极化率时，观察到当偶极矩减小时，极化率变得更大。含PDI的聚合物的极化率明显大于含NDI的聚合物，并且它们的极化率变化与瞬态荧光寿命的变化一致。还发现非富勒烯太阳能电池的功率转换效率与极化率密切相关。结果表明，极化率可用于筛选新型供体和受体聚合物，以设计和合成高性能太阳能电池。
