College of Chemistry, Nanchang University, 999 Xuefu Avenue, Nanchang, 330031, China.
Jiangxi Provincial Key Laboratory of New Energy Chemistry/Institute of Polymers, Nanchang University, 999 Xuefu Avenue, Nanchang, 330031, China.
Macromol Rapid Commun. 2018 Apr;39(7):e1700706. doi: 10.1002/marc.201700706. Epub 2018 Feb 5.
Main chain donor and side chain acceptor (D-s-A) copolymers are an important branch of the D-A copolymer family. However, the development of D-s-A copolymers significantly falls behind the alternative D-A copolymers, especially for organic solar cells, because a breakthrough in device performance is not yet obtained with a reported power conversion efficiency (PCE) of 2%-4%. Herein, a newly developed D-s-A copolymer PDRCNBDT, bearing 2-(1, 1-dicyanomethylene) rhodanine pendant group as the donor material, delivers a high PCE of 5.3% for nonfullerene solar cells. To the best of our knowledge, this is the best value reported for D-s-A copolymers to date. The improved PCE is observed to be associated with a very small energy loss (E ) of 0.57 eV, accompanied by a high open-circuit voltage (V ) of 1.015 eV. It is important to note that this efficient D-s-A copolymer is employed in organic solar cells (OSCs), free of additive and annealing treatments.
主链给体和侧链受体（D-s-A）共聚物是 D-A 共聚物家族的一个重要分支。然而，D-s-A 共聚物的发展明显落后于替代的 D-A 共聚物，特别是对于有机太阳能电池，因为尽管报道的功率转换效率（PCE）为 2%-4%，但尚未获得器件性能的突破。在此，开发了一种新型的 D-s-A 共聚物 PDRCNBDT，其作为给体材料，具有 2-(1,1-二氰基亚甲基)罗丹宁侧基，为非富勒烯太阳能电池提供了高达 5.3%的 PCE。据我们所知，这是迄今为止报道的 D-s-A 共聚物的最佳值。观察到的改进的 PCE 与非常小的能量损耗（E）0.57 eV 相关联，同时伴有开路电压（V）为 1.015 eV。值得注意的是，这种高效的 D-s-A 共聚物在没有添加剂和退火处理的情况下被用于有机太阳能电池（OSCs）。
