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-b:2′,3′-d]silole (DTS) and N-alkyl dithieno[3,2-b:2′,3-d]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.
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机译：我们在这里报告了具有宽吸收带的一系列新型受体共聚物的合成和表征。受体聚合物是由per二酰亚胺（PDI）和萘酰亚胺（NDI）以及二噻吩并[3,2- b ：2'，3'- d 的共聚物合成的] silole（DTS）和 N -烷基双硫杂诺[3,2- b ：2'，3- d ]吡咯（DTP）。当比较偶极矩和受体聚合物的极化率时，观察到当偶极矩减小时，极化率变大。含PDI的聚合物的极化率明显大于含NDI的聚合物，其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。
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