Sun Hua, Sun Po, Zhang Cong, Yang Yingguo, Gao Xingyu, Chen Fei, Xu Zongxiang, Chen Zhi-Kuan, Huang Wei
Key Laboratory of Flexible Electronics (KLOFE), Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, P. R. China.
Department of Chemistry, South University of Science and Technology of China, Shenzhen, 518055, P. R. China.
Chem Asian J. 2017 Apr 4;12(7):721-725. doi: 10.1002/asia.201601741. Epub 2017 Feb 7.
Derived from perylenediimide (PDI) building blocks, 3D PDI molecules are considered as a type of promising structure to overcome molecular aggregation, thus improving the performance of organic solar cells. Herein, we report a novel PDI-based derivative, SCPDT-PDI , with four PDI units connected to a unique spiro core. Attributed to this novel molecular design, SCPDT-PDI exhibits a rigid 3D structure, in which the aggregation tendency of PDI chromophores could be effectively attenuated. Additionally, strong intramolecular charge transfer and high charge mobility are achieved due to the well-conjugated structure and electron-rich property of SCPDT. Therefore, fullerene-free organic solar cells based on SCPDT-PDI and PTB7-Th achieve a remarkable high efficiency of 7.11 %. Such an excellent result demonstrates the opportunity of SCPDT to be a promising building block for non-fullerene acceptors.
三维苝二酰亚胺（PDI）分子由苝二酰亚胺（PDI）结构单元衍生而来，被认为是一种有望克服分子聚集问题的结构类型，从而提高有机太阳能电池的性能。在此，我们报道了一种新型的基于PDI的衍生物SCPDT-PDI，它有四个PDI单元连接到一个独特的螺环核心上。由于这种新颖的分子设计，SCPDT-PDI呈现出一种刚性的三维结构，其中PDI发色团的聚集倾向可以得到有效减弱。此外，由于SCPDT良好的共轭结构和富电子特性，实现了强分子内电荷转移和高电荷迁移率。因此，基于SCPDT-PDI和PTB7-Th的无富勒烯有机太阳能电池实现了7.11%的显著高效率。如此优异的结果证明了SCPDT作为非富勒烯受体的一种有前途的结构单元的可能性。
