Ma De-Li, Zhang Qian-Qian, Li Chang-Zhi
State Key Laboratory of Silicon Materials, MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, P. R. China.
Angew Chem Int Ed Engl. 2023 Jan 26;62(5):e202214931. doi: 10.1002/anie.202214931. Epub 2022 Dec 22.
Searching the cost-effective organic semiconductors is strongly needed in order to facilitate the practice of organic solar cells (OSCs), yet to be fulfilled. Herein, we have succeeded in developing two non-fused ring electron acceptors (NFREAs), leading to the highest efficiency of 16.2 % for the NFREA derived OSCs. These OSCs exhibit the superior operational stabilities under one sun equivalent illumination without ultraviolet (UV) filtration. It is revealed that the modulation of halogen substituents on aromatic side chains, as the new structural tool to tune the intermolecular interaction and optoelectronic properties of acceptors, not only promotes the interlocked tic-tac-toe frame of three-dimensional stacks in solid, but also improves charge dynamics of acceptors to enable high-performance and stable OSCs.
为了推动有机太阳能电池（OSC）的实际应用，迫切需要寻找具有成本效益的有机半导体，但这一目标尚未实现。在此，我们成功开发了两种非稠环电子受体（NFREA），由此制备的基于NFREA的有机太阳能电池效率高达16.2%。这些有机太阳能电池在相当于一个太阳光照强度且无紫外线过滤的条件下表现出优异的工作稳定性。研究表明，对芳香侧链上的卤素取代基进行调控，作为一种调节受体分子间相互作用和光电性能的新结构手段，不仅促进了固体中三维堆叠的联锁井字棋框架，还改善了受体的电荷动力学，从而实现高性能且稳定的有机太阳能电池。
