典型文献
Isomeric Fluorene-based Heteroundecenes with Different Side Chains Anchoring Positions for Small Molecule Acceptors
文献摘要：
Two isomeric fluorene-based heteroundecenes of bis(thienocyclopenthieno[3,2-b]thieno) fluorene (BT2T-F) and bis(dithieno[3,2-b:2',3'-d]thiophene)cyclopentafluorene (B3T-F) have been designed and synthesized. The side chains of 4-hexylphenyl anchor on the 5th and 8th positions in B3T-F while on the 4th and 9th positions in BT2T-F, in which the former is closer to the center of the fused ring. The corresponding acceptor-donor-acceptor (A-D-A) type small molecule acceptors (SMAs) of BT2T-FIC and B3T-FIC were prepared by linking BT2T-F and B3T-F as fused ring donor units with the acceptor unit of 2-(5,6-difluoro-3-oxo-2,3-dihydroinden-1-ylidene)malononitrile (IC-2F), respectively. B3T-FIC presents a superior crystallinity with intense face-on π-π stacking in its neat film while BT2T-FIC is more disordered. When blended with PBDB-T-2Cl as a polymer donor, the optimized PBDB-T-2Cl:BT2T-FIC device exhibits an averaged power conversion efficiency (PCE) of 10.56％ while only 7.53％ in the PBDB-T-2Cl:B3T-FIC device. The improved short-circuit current (Jsc) and fill factor (FF) of the PBDB-T-2Cl:BT2T-FIC device are the main contribution of its higher performance, which is attributed to its more efficient and balanced charge transport and better carrier recombination suppression. Given that BT2T-FIC blend and B3T-FIC blend films both take a preferential face-on orientated π-π stacking with comparable distances, the suitable SMA domain size obtained in the BT2T-FIC blend could account for its more efficient photovoltaic performance. These results highlight the importance of side-chain strategy in developing efficient SMAs with huge fused ring cores.
文献关键词：
中图分类号：
作者姓名：
WANG Wei;ZHAN Chun;XIAO Shengqiang
作者机构：
State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,China
文献出处：
引用格式：
[1]WANG Wei;ZHAN Chun;XIAO Shengqiang-.Isomeric Fluorene-based Heteroundecenes with Different Side Chains Anchoring Positions for Small Molecule Acceptors)[J].武汉理工大学学报（材料科学版）（英文版）,2022(01):136-147
A类：
Isomeric,Heteroundecenes,heteroundecenes,thienocyclopenthieno,BT2T,dithieno,cyclopentafluorene,B3T,hexylphenyl,dihydroinden,malononitrile
B类：
Fluorene,Different,Side,Chains,Anchoring,Positions,Small,Molecule,Acceptors,Two,isomeric,bis,thiophene,have,been,designed,synthesized,side,chains,anchor,5th,8th,positions,while,4th,9th,which,former,closer,center,fused,corresponding,donor,type,small,molecule,acceptors,SMAs,FIC,were,prepared,by,linking,units,difluoro,oxo,ylidene,2F,respectively,presents,superior,crystallinity,intense,face,stacking,neat,more,disordered,When,blended,PBDB,2Cl,polymer,optimized,device,exhibits,averaged,power,conversion,efficiency,PCE,only,improved,short,circuit,current,Jsc,fill,FF,contribution,higher,performance,attributed,efficient,balanced,charge,transport,better,carrier,recombination,suppression,Given,that,films,both,take,preferential,orientated,comparable,distances,suitable,domain,obtained,could,account,photovoltaic,These,results,highlight,importance,strategy,developing,huge,cores
AB值：
0.454307
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