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

Wenbin Lai ¹Safakath Karuthedath ²Chengyi Xiao ³Lei Meng ¹Frédéric Laquai ⁴Weiwei Li ³Yongfang Li¹

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作者信息

1. Beijing National Laboratory for Molecular Sciences,Key Laboratory of Organic Solids,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China
2. 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;Institute of Materials Research,Tsinghua Shenzhen International Graduate School,Tsinghua University,Shenzhen 518055,China
3. 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
4. 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
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Abstract

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 semi-rigid 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 crys-tallinity 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.

Key words

Double-cable conjugated polymer/Single-component organic solar cell/Crystallinity/Semirigid linkers/Alkyl-thiophene-alkyl

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基金项目

北京市自然科学基金(JQ21006)

科技部项目(2018YFA0208504)

国家自然科学基金(buctrc201828)

国家自然科学基金(XK1802-2)

Open Project of State Key Laboratory of Organic-Inorganic Composites(oic-202201006)

Open Project of State Key Laboratory of Supramolecular Structure and Materials(sklssm202209)

King Abdullah University of Science and Technology(KAUST)()

出版年

2024

中国化学快报(英文版)

中国化学会

中国化学快报(英文版)

CSTPCDCSCD

影响因子：0.771

ISSN：1001-8417

参考文献量2

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