High-Performance D–A Copolymer Donor Based on Difluoroquinoxaline A-Unit with Alkyl-Chlorothiophene Substituents for Polymer Solar Cells

Abstract

Open AccessCCS ChemistryRESEARCH ARTICLES15 Dec 2022High Performance D-A Copolymer Donor Based on Difluoroquinoxaline A-unit with Alkyl-chlorothiophene Substituents for Polymer Solar Cells Can Zhu, Ke Hu, Lei Meng, Xiaolei Kong, Wenbin Lai, Shucheng Qin, Beibei Qiu, Jinyuan Zhang, Zhanjun Zhang, Yilei Wu, Xiaojun Li and Yongfang Li Can Zhu Google Scholar More articles by this author , Ke Hu Google Scholar More articles by this author , Lei Meng Google Scholar More articles by this author , Xiaolei Kong Google Scholar More articles by this author , Wenbin Lai Google Scholar More articles by this author , Shucheng Qin Google Scholar More articles by this author , Beibei Qiu Google Scholar More articles by this author , Jinyuan Zhang Google Scholar More articles by this author , Zhanjun Zhang Google Scholar More articles by this author , Yilei Wu Google Scholar More articles by this author , Xiaojun Li Google Scholar More articles by this author and Yongfang Li Google Scholar More articles by this author https://doi.org/10.31635/ccschem.022.202202491 SectionsSupplemental MaterialAboutPDF ToolsAdd to favoritesDownload CitationsTrack Citations ShareFacebookTwitterLinked InEmail Side chain engineering with fluorine substitution is widely used in enhancing photovoltaic performance of polymer donors in the research field of polymer solar cells (PSCs). However, fluorine substitution has the disadvantages of complicated synthesis and high cost. Here, we synthesized a novel D-A copolymer donor PBQ9 based on difluoroquinoxaline A-unit with chlorine substitution on its alkyl-thiophene side chains instead of fluorine substitution in the polymer donor PBQ6, which greatly shortens the synthetic route and reduces the cost. Interestingly, the optimized binary PSC with PBQ9 as polymer donor and m-TEH as acceptor demonstrated a high power conversion efficiency (PCE) of 18.81% (certified PCE of 18.33% by National Institute of Metrology (NIM), China) with a high fill factor (FF) of 80.59%, and the photovoltaic performance of the PSCs is insensitive to the different batches of the polymer donor. The results indicate that PBQ9 is a high-performance polymer donor and the chlorine substitution is an effective strategy for improving photovoltaic performance and reducing cost of the polymer donors. Download figure Download PowerPoint Previous articleNext article FiguresReferencesRelatedDetails Issue AssignmentVolume 0Issue jaPage: 1-43Supporting Information Copyright & Permissions© 2022 Chinese Chemical Society Downloaded 83 times PDF downloadLoading ...