Alkyl-thiophene-alkyl linkers to construct double-cable conjugated polymers for single-component organic solar cells  

作　　者：Wenbin Lai Safakath Karuthedath Chengyi Xiao Lei Meng Frédéric Laquai Weiwei Li Yongfang Li 

机构地区：[1]Beijing National Laboratory for Molecular Sciences,Key Laboratory of Organic Solids,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190,China [2]Beijing Advanced Innovation Center for Soft Matter Science and Engineering&State Key Laboratory of Organic-Inorganic Composites,Beijing University of Chemical Technology,Beijing 100029,China [3]King Abdullah University of Science and Technology(KAUST),KAUST Solar Center(KSC),Physical Sciences and Engineering Division(PSE),Material Science and Engineering Program(MSE),Thuwal 23955-6900,Kingdom of Saudi Arabia [4]University of Chinese Academy of Sciences,Beijing 100049,China [5]Institute of Materials Research,Tsinghua Shenzhen International Graduate School,Tsinghua University,Shenzhen 518055,China

出　　处：《Chinese Chemical Letters》2024年第1期542-546,共5页中国化学快报（英文版）

基　　金：the Beijing Natural Science Foundation(No.JQ21006);the Ministry of Science and Technology(No.2018YFA0208504);the National Natural Science Foundation(Nos.92163128,52073016,21905018)of China;the Fundamental Research Funds for the Central Universities(Nos.buctrc201828,XK1802-2);Open Project of State Key Laboratory of Organic-Inorganic Composites(No.oic-202201006);Open Project of State Key Laboratory of Supramolecular Structure and Materials(No.sklssm202209).

摘　　要：In this work,semirigid linkers of the alkyl-thiophene-alkyl structure are developed to construct double-cable polymers.Three alkyl units,propyl(C3H6),hexyl(C6H12),and dodecyl(C12H24),are applied as semirigid linkers,yielding three double-cable polymers:PBC6-T,PBC12-T,and PBC24-T,respectively.PBC12-T which uses C6H12-thiophene-C6H12 linkers is found to exhibit the best device efficiency of 5.56%,while PBC6-T and PBC24-T with shorter or longer linkers yield device efficiencies of only 2.65%and 1.09%in single-component organic solar cells(SCOSCs).Further studies reveal that PBC12-T exhibits higher crystallinity and improved charge transport,resulting in better efficiencies.Our work provides an approach to construct double-cable conjugated polymers with long alkyl linkers,and it shows the importance of the linker length for the photovoltaic performance of SCOSCs.

关 键 词：Double-cable conjugated polymer Single-component organic solar cell Crystallinity Semirigid linkers Alkyl-thiophene-alkyl 

分 类 号：TM914.4[电气工程—电力电子与电力传动] TQ317[化学工程—高聚物工业]