All-polymer solar cells(all-PSCs)possess attractive merits including superior thermal stability and mechanical flexibility for large-area roll-to-roll processing.Introducing flexible conjugation-break spacers(FCBSs)into backbones of polymer donor(PD)or polymer acceptor(PA)has been demonstrated as an efficient approach to enhance both the photovoltaic(PV)and mechanical properties of the all-PSCs.However,length dependency of FCBS on certain all-PSC related properties has not been systematically explored.In this regard,we report a series of new non-conjugated PAS by incorporating FCBS with various lengths(2,4,and 8 carbon atoms in thioalkyl segments).Unlike com-mon studies on so-called side-chain engineering,where longer side chains would lead to better solubility of those resulting polymers,in this work,we observe that the solubilities and the resulting photovoltaic/mechanical properties are optimized by a proper FCBS length(i.e.,C2)in PA named PYTS-C2.Its all-PSC achieves a high efficiency of 11.37％,and excellent mechanical robustness with a crack onset strain of 12.39％,significantly superior to those of the other PAS.These results firstly demonstrate the effects of FCBS lengths on the PV performance and mechanical properties of the all-PSCs,providing an effective strategy to fine-tune the structures of PAS for highly efficient and mechanically robust PSCs.

Qiaonan Chen;Yung Hee Han;Leandro R.Franco;Cleber F.N.Marchiori;Zewdneh Genene;C.Moyses Araujo;Jin-Woo Lee;Tan Ngoc-Lan Phan;Jingnan Wu;Donghong Yu;Dong Jun Kim;Taek-Soo Kim;Lintao Hou;Bumjoon J.Kim;Ergang Wang

Siyuan Laboratory,Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials,Department of Physics,Jinan University,Guangzhou 510632,People's Republic of China;Department of Chemistry and Chemical Engineering,Chalmers University of Technology,SE-412 96,G?teborg,Sweden;Department of Chemical and Biomolecular Engineering,Korea Advanced Institute of Science and Technology(KAIST),Daejeon 34141,Republic of Korea;Department of Engineering and Physics,Karlstad University,65188 Karlstad,Sweden;Materials Theory Division,Department of Physics and Astronomy,Uppsala University,75120 Uppsala,Sweden;Department of Chemistry and Bioscience,Aalborg University,9220 Aalborg,Denmark;Sino-Danish Center for Education and Research,8000 Aarhus,Denmark;Department of Mechanical Engineering,Korea Advanced Institute of Science and Technology(KAIST),Daejeon 34141,Republic of Korea;School of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450001,People's Republic of China

纳微快报（英文）

[1]Qiaonan Chen;Yung Hee Han;Leandro R.Franco;Cleber F.N.Marchiori;Zewdneh Genene;C.Moyses Araujo;Jin-Woo Lee;Tan Ngoc-Lan Phan;Jingnan Wu;Donghong Yu;Dong Jun Kim;Taek-Soo Kim;Lintao Hou;Bumjoon J.Kim;Ergang Wang-.Effects of Flexible Conjugation-Break Spacers of Non-Conjugated Polymer Acceptors on Photovoltaic and Mechanical Properties of All-Polymer Solar Cells)[J].纳微快报（英文）,2022(10):164-177

Spacers,FCBSs,FCBS,thioalkyl,PYTS

Effects,Flexible,Conjugation,Break,Non,Conjugated,Polymer,Acceptors,Photovoltaic,Mechanical,Properties,All,Solar,Cells,solar,cells,PSCs,possess,attractive,merits,including,superior,thermal,stability,flexibility,large,area,roll,processing,Introducing,flexible,conjugation,break,spacers,into,backbones,donor,acceptor,has,been,demonstrated,efficient,approach,enhance,both,photovoltaic,PV,properties,However,dependency,certain,related,not,systematically,explored,this,regard,report,series,new,conjugated,PAS,by,incorporating,various,lengths,carbon,atoms,segments,Unlike,com,studies,called,side,engineering,where,longer,chains,would,lead,better,solubility,those,resulting,polymers,work,observe,that,solubilities,optimized,C2,named,Its,achieves,efficiency,excellent,robustness,crack,onset,strain,significantly,other,These,results,firstly,effects,performance,providing,effective,strategy,fine,tune,structures,highly,mechanically

0.569784