Volume 136, Issue 48 e202408960
Forschungsartikel

Configurational Isomerization-Induced Orientation Switching: Non-Fused Ring Dipodal Phosphonic Acids as Hole-Extraction Layers for Efficient Organic Solar Cells

Lei Zhang

Lei Zhang

State Key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing, 100029 China

These authors contributed equally to this work

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Yuxing Wang

Yuxing Wang

State Key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing, 100029 China

These authors contributed equally to this work

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Junjie Wen

Junjie Wen

State Key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing, 100029 China

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Yifan Huang

Yifan Huang

Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190 China

University of Chinese Academy of Sciences, Beijing, 100049 China

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Jiaxin Gao

Jiaxin Gao

State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Center for Advanced Low-dimension Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620 China

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Yuxin Duan

Yuxin Duan

State Key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing, 100029 China

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Soohyung Park

Soohyung Park

Advanced Analysis Center, Korea Institute of Science and Technology, and Division of Nanoscience & Technology, KIST School, University of Science and Technology (UST), Seoul, 02792 Republic of Korea

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Woojin Shin

Woojin Shin

Department of Physics, Kangwon National University, 1 Gangwondaehak-gil, Chuncheon-si, Gangwon-do, 24341 Republic of Korea

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Zaifei Ma

Zaifei Ma

State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Center for Advanced Low-dimension Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620 China

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Miao Liu

Miao Liu

Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190 China

University of Chinese Academy of Sciences, Beijing, 100049 China

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Sang Wan Cho

Sang Wan Cho

Department of Physics, Yonsei University, 1 Yonseidae-gil, Wonju-si, Gangwon-do, 26493 Republic of Korea

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Yeonju Park

Yeonju Park

Department of Chemistry, Institute for Molecular Science and Fusion Technology, Kangwon National University, 1 Gangwondaehak-gil, Chuncheon-si, Gangwon-do, 24341 Republic of Korea

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Young Mee Jung

Young Mee Jung

Department of Chemistry, Institute for Molecular Science and Fusion Technology, Kangwon National University, 1 Gangwondaehak-gil, Chuncheon-si, Gangwon-do, 24341 Republic of Korea

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Hyunbok Lee

Corresponding Author

Hyunbok Lee

Department of Physics, Kangwon National University, 1 Gangwondaehak-gil, Chuncheon-si, Gangwon-do, 24341 Republic of Korea

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Wenxu Liu

Corresponding Author

Wenxu Liu

State Key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing, 100029 China

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Yao Liu

Corresponding Author

Yao Liu

State Key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing, 100029 China

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First published: 30 August 2024

Abstract

Phosphonic acid (PA) self-assembled molecules have recently emerged as efficient hole-extraction layers (HELs) for organic solar cells (OSCs). However, the structural effects of PAs on their self-assembly behaviors on indium tin oxide (ITO) and thus photovoltaic performance remain obscure. Herein, we present a novel class of PAs, namely “non-fused ring dipodal phosphonic acids” (NFR-DPAs), featuring simple and malleable non-fused ring backbones and dipodal phosphonic acid anchoring groups. The efficacy of configurational isomerism in modulating the photoelectronic properties and switching molecular orientation of PAs atop electrodes results in distinct substrate surface energy and electronic characteristics. The NFR-DPA with linear (C2h symmetry) and brominated backbone exhibits favorable face-on orientation and enhanced work function modification capability compared to its angular (C2v symmetry) and non-brominated counterparts. This makes it versatile HELs in mitigating interfacial resistance for energy barrier-free hole collection, and affording optimal active layer morphology, which results in an impressive efficiency of 19.11 % with a low voltage loss of 0.52 V for binary OSC devices and an excellent efficiency of 19.66 % for ternary OSC devices. This study presents a new dimension to design PA-based HELs for high-performance OSCs.

Conflict of Interests

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available in the Supporting Information of this article.

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