High-Efficiency and Low-Energy-Loss Organic Solar Cells Enabled by Tuning Conformations of Dimeric Electron Acceptors

Open AccessCCS ChemistryRESEARCH ARTICLES6 Jan 2023High-Efficiency and Low-Energy-Loss Organic Solar Cells Enabled by Tuning Conformations of Dimeric Electron Acceptors Xiaobin Gu, Yanan Wei, Na Yu, Jiawei Qiao, Ziyang Han, Qijie Lin, Xiao Han, Jinhua Gao, Congqi Li, Jianqi Zhang, Xiaotao Hao, Zhixiang Wei, Zheng Tang, Yunhao Cai, Xin Zhang and Hui Huang Xiaobin Gu Google Scholar More articles by this author , Yanan Wei Google Scholar More articles by this author , Na Yu Google Scholar More articles by this author , Jiawei Qiao Google Scholar More articles by this author , Ziyang Han Google Scholar More articles by this author , Qijie Lin Google Scholar More articles by this author , Xiao Han Google Scholar More articles by this author , Jinhua Gao Google Scholar More articles by this author , Congqi Li Google Scholar More articles by this author , Jianqi Zhang Google Scholar More articles by this author , Xiaotao Hao Google Scholar More articles by this author , Zhixiang Wei Google Scholar More articles by this author , Zheng Tang Google Scholar More articles by this author , Yunhao Cai Google Scholar More articles by this author , Xin Zhang Google Scholar More articles by this author and Hui Huang Google Scholar More articles by this author https://doi.org/10.31635/ccschem.023.202202575 SectionsSupplemental MaterialAboutPDF ToolsAdd to favoritesDownload CitationsTrack Citations ShareFacebookTwitterLinked InEmail Dimeric fused-ring electron acceptors (DFREAs) have attracted much attention due to their combined advantages of monomeric and polymeric acceptors, including a well-defined molecular structure, excellent repeatability, and morphology stability. However, the additionally-introduced single-bonds during dimerization may result in a twisted backbone of DFREAs, which is detrimental to intermolecular packing and charge transport. Herein, three DFREAs are designed and synthesized, of which conformations were systematically tuned via adjusting the intensities of intramolecular noncovalent interactions (INIs) to achieve high performance organic solar cells (OSCs). Theoretical and experimental results show that the gradual introduction of S⋯F INIs can continuously improve molecular planarity and rigidity, resulting in reduced reorganization energies, ordered packing mode, and enhanced crystallization of DFREAs. Benefiting from the incorporation of four-fold S⋯F INIs, DYF-TF-based binary OSCs show a record high efficiency of 18.26% with an extremely low energy loss (0.493 eV) for DFREA-based OSCs. In addition, DYF-TF-based OSCs exhibited a good long-term stability with a T80% lifetime of 2681 h, and the PCE of the DYF-TF-based ternary device is further enhanced to 18.73%. This contribution demonstrates the great potential of the INIs strategy in achieving excellent DFREAs materials. Download figure Download PowerPoint Previous articleNext article FiguresReferencesRelatedDetails Issue AssignmentVolume 0Issue jaPage: 1-61Supporting Information Copyright & Permissions© 2023 Chinese Chemical Society Downloaded 0 times PDF downloadLoading ...