High‐Performance Noncovalently Fused‐Ring Electron Acceptors for Organic Solar Cells Enabled by Noncovalent Intramolecular Interactions and End‐Group Engineering

• DOI: 10.1002/anie.202100390
• Publication Date: 2021-03-22T03:31:26Z
• Authors: Xin Zhang; Linqing Qin; Jianwei Yu; Yuhao Li; Yanan Wei; Xingzheng Liu; Xinhui Lu; Feng Gao; Hui Huang
• Keywords: Non-covalent interactions

Abstract Noncovalently fused‐ring electron acceptors (NFREAs) have attracted much attention in recent years owing to their advantages of simple synthetic routes, high yields and low costs. However, the efficiencies NFREAs based organic solar cells (OSCs) are still far behind those (FREAs). Herein, a series with S⋅⋅⋅O noncovalent intramolecular interactions were designed synthesized two‐step route. Upon introducing π‐extended end‐groups into backbones, electronic properties, charge transport, film morphology, energy loss precisely tuned by fine‐tuning degree multi‐fluorination. As result, record PCE 14.53 % labs certified 13.8 for devices obtained. This contribution demonstrated that combining strategies conformational locks end‐group engineering is effective way explore high‐performance NFREAs.