The polymerization of fused-ring acceptors(FRAs)to afford their corresponding polymeric acceptors for high-performance all-polymer solar cells(all-PSCs)has achieved remarkable progress in the past few years.However,due to the high degree of synthetic complexity for the monomer,the high-cost of these polymeric acceptors may limit their commercial applications.Thus,it is urgent to develop inexpensive and high-performance polymeric acceptors for all-PSCs.Herein,two novel polymeric acceptors(PBTzO and PBTzO-2F)have been designed and synthesized by copolymerization of noncovalently fused ring acceptors(NFRAs),which were employed in all-PSCs for the first time.Upon introducing the"noncovalently conformational locks(NoCLs)"in the backbone and selective fluorination of the end-group,photophysical and electrical properties,and solid-state packing properties of the NFRAs have been rationally tuned.As a result,the PBDB-T:PBTzO-2F based devices presented an excellent power conversion efficiency(PCE)of 11.04％,much higher than that of PBTzO based ones due to the increased charge generation and extraction,improved hole transfer and carrier mobilities,and reduced energy loss.More importantly,PBTzO-2F exhibited a much lower synthetic complexity(SC)index and higher figure-of-merit(FOM)values than the high-performance fused-ring acceptor based polymer acceptors(FRA-PAs)due to the simpler structures and more effective synthesis.This contribution provided a novel idea to achieve low-cost and high-performance all-PSCs.

Xiaobin Gu;Yanan Wei;Xingzheng Liu;Na Yu;Laiyang Li;Ziyang Han;Jinhua Gao;Congqi Li;Zhixiang Wei;Zheng Tang;Xin Zhang;Hui Huang

College of Materials Science and Opto-Electronic Technology,Center of Materials Science and Optoelectronics Engineering,CAS Center for Excellence in Topological Quantum Computation,CAS Key Laboratory of Vacuum Physics,University of Chinese Academy of Sciences,Beijing 100049,China;Center for Advanced Low-dimension Materials,State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,College of Materials Science and Engineering,Donghua University,Shanghai 201620,China;CAS Key Laboratory of Nanosystem and Hierarchical Fabrication,CAS Center for Excellence in Nanoscience,National Center for Nanoscience and Technology,Beijing 100190,China

中国科学:化学（英文版）

[1]Xiaobin Gu;Yanan Wei;Xingzheng Liu;Na Yu;Laiyang Li;Ziyang Han;Jinhua Gao;Congqi Li;Zhixiang Wei;Zheng Tang;Xin Zhang;Hui Huang-.Low-cost polymer acceptors with noncovalently fused-ring backbones for efficient all-polymer solar cells)[J].中国科学:化学（英文版）,2022(05):926-933

noncovalently,FRAs,PBTzO,NFRAs,NoCLs

Low,cost,acceptors,fused,ring,backbones,efficient,solar,cells,afford,their,corresponding,polymeric,performance,PSCs,has,achieved,remarkable,progress,past,few,years,However,due,degree,synthetic,complexity,monomer,these,may,limit,commercial,applications,Thus,urgent,develop,inexpensive,Herein,two,novel,2F,have,been,designed,synthesized,by,copolymerization,which,were,employed,first,Upon,introducing,conformational,locks,selective,fluorination,end,group,photophysical,electrical,properties,solid,state,packing,rationally,tuned,result,PBDB,devices,presented,excellent,power,conversion,efficiency,PCE,much,higher,than,that,increased,charge,generation,extraction,improved,hole,transfer,carrier,mobilities,reduced,energy,loss,More,importantly,exhibited,lower,figure,merit,FOM,values,PAs,simpler,structures,more,effective,synthesis,This,contribution,provided,idea

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