biostudies-literatureKim HKHong Kong Innovation and Technology CommissionBasic and Applied Research Major Program of Guangdong ProvinceFundamental Research Funds for the Central UniversityNational Natural Science Foundation of ChinaHong Kong Research Grants CouncilFoshan-HKUSTNational Key Research and Development Program of ChinaShen Zhen Technology and Innovation Commissione2202223https://www.ebi.ac.uk/biostudies/studies/S-EPMC9443469biostudies-literatureUnknown9(25)A group of regioregular polymer acceptors is synthesized by polymerizing Y6 moieties with different linker units including thiophene, vinylene, 2,2'-bithiophene, and thieno[3,2-b]thiophene, and their optoelectrical properties and photovoltaic performances are studied systematically. It is found that the linker units have significant impacts on the backbone planarity, conjugation, and hence optoelectrical properties of polymer acceptors. The vinylene-based PYF-V-o polymer shows a smaller dihedral angle between the end groups and vinylene units and a more rigid polymer backbone, thus affording bathochromic absorption and better electron-transporting capacity. As a result, the PM6:PYF-V-o based all-polymer solar cells (all-PSCs) are able to achieve the highest power conversion efficiency of 1Advanced science (Weinheim, Baden-Wurttemberg, Germany)Linker Unit Modulation of Polymer Acceptors Enables Highly Efficient Air-Processed All-Polymer Solar Cells.PMC9443469FSUST19-CAT0202163100192019YFA0705900020514380274ITC-CNERC14SC01C6023-19G1630922116310020JCYJ202001091408017512019B03030200722075057Kim HKQi ZChen SYan HYu HShi XPan MZhao HLiu WMa WfalseLinker Unit Modulation of Polymer Acceptors Enables Highly Efficient Air-Processed All-Polymer Solar Cells.A group of regioregular polymer acceptors is synthesized by polymerizing Y6 moieties with different linker units including thiophene, vinylene, 2,2'-bithiophene, and thieno[3,2-b]thiophene, and their optoelectrical properties and photovoltaic performances are studied systematically. It is found that the linker units have significant impacts on the backbone planarity, conjugation, and hence optoelectrical properties of polymer acceptors. The vinylene-based PYF-V-o polymer shows a smaller dihedral angle between the end groups and vinylene units and a more rigid polymer backbone, thus affording bathochromic absorption and better electron-transporting capacity. As a result, the PM6:PYF-V-o based all-polymer solar cells (all-PSCs) are able to achieve the highest power conversion efficiency of 12022-01-01T00:00:00Z2022 Sep2025-04-04T12:26:46.347Z2025-04-04T12:26:46.347ZS-EPMC94434693581130510.1002/advs.202202223