Impact of Linker Engineering in Core‐Linked Dimeric Acceptors for High‐Performance Organic Solar Cells

Oh, Shinbee; Jeong, Dahyun; Bae, Kihyun; Kim, Geon‐U; Phan, Tan Ngoc‐Lan; Lee, Jin‐Woo; Park, Jinseok; Lee, Dongchan; Cho, Shinuk; Kim, Bumjoon J.

doi:10.1002/adfm.202406501

Title: Impact of Linker Engineering in Core‐Linked Dimeric Acceptors for High‐Performance Organic Solar Cells

Journal Article · 02 July 2024 · Advanced Functional Materials

DOI: https://doi.org/10.1002/adfm.202406501 · OSTI ID:2482604

Oh, Shinbee ^[1]; Jeong, Dahyun ^[1]; Bae, Kihyun ^[1]; Kim, Geon‐U ^[1]; Phan, Tan Ngoc‐Lan ^[1]; Lee, Jin‐Woo ^[1]; Park, Jinseok ^[1]; Lee, Dongchan ^[2]; Cho, Shinuk ^[2];

^[1]

Department of Chemical and Biomolecular Engineering Korea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea
Department of Semiconductor Physics &, Engineering and EHSRC University of Ulsan Ulsan 44610 Republic of Korea

Abstract The dimerization of small molecule acceptors (SMAs) is a promising strategy for enhancing the long‐term stability and power conversion efficiency (PCE) of organic solar cells (OSCs). However, the reported DSMAs are primarily limited to end‐linked molecular configurations, highlighting the need for further exploration of various dimer architectures. Herein, the development of two distinct core‐linked dimerized SMAs (DYF‐V and DYF‐E) are reported with tailored linker structures (vinylene and ethynyl, respectively), achieving high‐performance OSCs (PCE = 18.53%). Interestingly, a subtle change in the linker structures results in markedly different molecular properties and photovoltaic performances of the dimer acceptors. DYF‐E with an ethynyl linker exhibits more twisted backbone conformation and mitigated aggregation property compared to DYF‐V, inducing desirable blend morphologies with a polymer donor including high crystallinity, face‐on oriented packing structures, and well‐intermixed domains. Thus, the DYF‐E‐based OSCs exhibit a high PCE (17.02%), which significantly outperforms the DYF‐V‐based OSCs (PCE = 9.98%). Furthermore, the ternary OSCs based on DYF‐E achieve a higher PCE of 18.53%. Thus, this study highlights the significance of selecting an appropriate linker in core‐linked dimerized SMAs for producing high‐performance OSCs.

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Sponsoring Organization:: USDOE

Grant/Contract Number:: AC02-05CH11231

OSTI ID:: 2482604

Journal Information:: Advanced Functional Materials, Journal Name: Advanced Functional Materials Journal Issue: 41 Vol. 34; ISSN 1616-301X

Publisher:: Wiley Blackwell (John Wiley & Sons)Copyright Statement

Country of Publication:: Germany

Language:: English

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Inhibiting excessive molecular aggregation to achieve highly efficient and stabilized organic solar cells by introducing a star-shaped nitrogen heterocyclic-ring acceptor Liao, Xunfan; Xie, Qian; Guo, Yaxiao Energy & Environmental Science, Vol. 15, Issue 1 https://doi.org/10.1039/D1EE02858H	journal	January 2022
Sequentially regular polymer acceptors featuring flexible spacers for high-performance and mechanically robust all-polymer solar cells Lee, Jin-Woo; Sun, Cheng; Lee, Sun-Woo Energy & Environmental Science, Vol. 15, Issue 11 https://doi.org/10.1039/D2EE02523J	journal	January 2022
An alloy small molecule acceptor for green printing organic solar cells overcoming the scaling lag of efficiency Wan, Ji; Wu, Yao; Sun, Rui Energy & Environmental Science, Vol. 15, Issue 12 https://doi.org/10.1039/D2EE03134E	journal	January 2022
3D acceptors with multiple A–D–A architectures for highly efficient organic solar cells Chen, Hongbin; Zhang, Zhe; Wang, Peiran Energy & Environmental Science, Vol. 16, Issue 4 https://doi.org/10.1039/D2EE03902H	journal	January 2023
Trimerized small-molecule acceptors enable high-performance organic solar cells with high open-circuit voltage and prolonged life-time Lee, Jin-Woo; Sun, Cheng; Phan, Tan Ngoc-Lan Energy & Environmental Science, Vol. 16, Issue 8 https://doi.org/10.1039/D3EE00272A	journal	January 2023
Molecular design revitalizes the low-cost PTV-polymer for highly efficient organic solar cells Ren, Junzhen; Bi, Pengqing; Zhang, Jianqi National Science Review, Vol. 8, Issue 8 https://doi.org/10.1093/nsr/nwab031	journal	February 2021
Quantifying Losses in Open-Circuit Voltage in Solution-Processable Solar Cells Yao, Jizhong; Kirchartz, Thomas; Vezie, Michelle S. Physical Review Applied, Vol. 4, Issue 1 https://doi.org/10.1103/PhysRevApplied.4.014020	journal	July 2015

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