Significant progress has been achieved for all-polymer solar cells(APSCs)in the last few years by the use of polymerized small molecular acceptors(PSMAs).Developing high electron mobility polymer acceptors has been considered a feasible solution to further improve the photovoltaic performance of APSCs and fabricate thick film devices,which contributed to roll-to-roll printing techniques.In this work,we designed and synthesized PSV,an A-DA'D-A small molecule acceptor-based PSMA with the vinyl group as a bridged linkage to reduce the steric hindrance between the 1,1-dicyanomethylene-3-indanone(IC)terminal group.In comparison with the C-C bond linked polymer acceptor PS,PSV exhibits an almost planar conjugated framework and well-ordered molecular stacking in the thin film.Moreover,PSV exhibits superior n-type semiconducting properties with high electron mobility of up to 0.54 cm2·V-1·s-1,which is the highest value among reported PSMAs.By utilizing PM6 as a polymer donor,PSV-based blend forms a favorable nanomorphology and exhibits high and well-balanced hole/electron mobilities,which is beneficial for exciton separation and charge transport.Consequently,APSCs based on PM6:PSV achieved high power conversion efficiencies of upto 15.73％,with a simultaneously realized high Voc of 0.923 V,Jsc of 23.2 mA·cm-2,and FF of 0.734.Such superior features enable PSV with excellent thickness-insensitive properties and over 13％PCE was obtained at 300 nm.To the best of our knowledge,the high PCE of 15.73％with excellent electron mobility of 0.54 cm2·V-1·s-1 is the highest values reported for APSCs.These results point to the great significance of developing polymer acceptors with a high electron mobility for boosting the performance of APSCs.

School of Chemistry and Chemical Engineering,Shanxi University,Taiyuan 030006,China;Beijing National Laboratory for Molecular Sciences,CAS Key Laboratory of Organic Solids,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China;Department of Physics and Applied Optics Beijing Area Major Laboratory,Center for Advanced Quantum Studies,Beijing Normal University,Beijing 100875,China

[1]Feng Liu;Ri Sun;Cheng-Yu Wang;Liang Zhou;Wen-Li Su;Qi-Hui Yue;Shuai Sun;Wu-Yue Liu;Hai-Jun Fan;Wen-Kai Zhang;Yun-Long Guo;Li-Heng Feng;Xiao-Zhang Zhu-.Planarized Polymer Acceptor Featuring High Electron Mobility for Efficient All-Polymer Solar Cells)[J].高分子科学（英文版）,2022(08):968-978

Planarized,APSCs,dicyanomethylene,nanomorphology,upto

Polymer,Acceptor,Featuring,High,Electron,Mobility,Efficient,All,Solar,Cells,Significant,progress,has,been,achieved,solar,cells,last,few,years,by,use,polymerized,small,molecular,acceptors,PSMAs,Developing,electron,mobility,considered,feasible,solution,further,improve,photovoltaic,performance,fabricate,film,devices,which,contributed,roll,printing,techniques,In,this,designed,synthesized,PSV,DA,molecule,vinyl,group,bridged,linkage,reduce,steric,hindrance,between,indanone,IC,terminal,comparison,bond,linked,exhibits,almost,planar,conjugated,framework,well,ordered,stacking,thin,Moreover,superior,type,semiconducting,properties,highest,among,reported,By,utilizing,PM6,donor,blend,forms,favorable,balanced,hole,mobilities,beneficial,exciton,separation,charge,transport,Consequently,power,conversion,efficiencies,simultaneously,realized,Voc,Jsc,mA,FF,Such,features,enable,excellent,thickness,insensitive,PCE,was,obtained,To,best,our,knowledge,values,These,results,point,great,significance,developing,boosting

0.55134