Acridine‐Substituted‐Centronucleus Nonfullerene Acceptors Enables Organic Solar Cells with Over 20% Efficiency with Low Nonradiative Recombination Loss

In this work, we propose a novel strategy of introducing luminescent acridine units for central nuclear substitution in quinoxaline-based acceptor molecules (named AQx-o-Ac and AQx-m-Ac) to enhance their photoluminescence quantum yields (PLQY), which can effectively improve the electroluminescent quantum efficiency (EQE<sub>EL</sub>) of OSCs and thereby suppress ΔE<sub>nr</sub>. In addition, the substituted acridine unit accelerates molecular aggregation and optimizes molecular crystallization, effectively alleviating the static disorder of acceptor molecules and facilitating charge extraction and transport in OSCs. As a result, the PM6:AQx-m-Ac binary OSCs achieve an excellent PCE of 18.64% with an exceptionally low ΔE<sub>nr</sub> of 0.166 eV. To the best of our knowledge, a ΔE<sub>nr</sub> of 0.166 eV represents the lowest value reported for OSCs achieving PCEs over 18 %. Finally, the acceptor AQx-m-Ac is incorporated into PM6:eC9 blend as the third component, and the optimal ternary device produces a superior PCE of 20.28%. This work highlights the potential of promoting luminescence for suppressing nonradiative energy loss and charts a viable path for upcoming breakthrough in high-efficiency organic photovoltaics.

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Publication Details

Journal
Angewandte Chemie International Edition
Published
2025-04-03
DOI
https://doi.org/10.1002/anie.202500129
Citations
21
Primary Topic
Organic Electronics and Photovoltaics
Type
article
Field-Weighted Citation Impact
15.34
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article

Acridine‐Substituted‐Centronucleus Nonfullerene Acceptors Enables Organic Solar Cells with Over 20% Efficiency with Low Nonradiative Recombination Loss

Zhongwei Ge, Zhaozhao Bi, Huotian Zhang, Zheng Tang et al.
21 citations
Angewandte Chemie International Edition
Organic Electronics and Photovoltaics
15.34
article

Acridine‐Substituted‐Centronucleus Nonfullerene Acceptors Enables Organic Solar Cells with Over 20% Efficiency with Low Nonradiative Recombination Loss

Zhongwei Ge, Zhaozhao Bi, Huotian Zhang, Zheng Tang, Feng Gao, Jiawei Qiao, Xiaotao Hao, Wei Ma, Jiaxin Gao, Yanming Sun, Jianqi Zhang, Junjie Zhang, Sha Liu, Jinfeng Liu, Liming Liu, Xiaopeng Duan, Junjie Yan, Y. Li
article en
21 citations

Abstract

In this work, we propose a novel strategy of introducing luminescent acridine units for central nuclear substitution in quinoxaline-based acceptor molecules (named AQx-o-Ac and AQx-m-Ac) to enhance their photoluminescence quantum yields (PLQY), which can effectively improve the electroluminescent quantum efficiency (EQE<sub>EL</sub>) of OSCs and thereby suppress ΔE<sub>nr</sub>. In addition, the substituted acridine unit accelerates molecular aggregation and optimizes molecular crystallization, effectively alleviating the static disorder of acceptor molecules and facilitating charge extraction and transport in OSCs. As a result, the PM6:AQx-m-Ac binary OSCs achieve an excellent PCE of 18.64% with an exceptionally low ΔE<sub>nr</sub> of 0.166 eV. To the best of our knowledge, a ΔE<sub>nr</sub> of 0.166 eV represents the lowest value reported for OSCs achieving PCEs over 18 %. Finally, the acceptor AQx-m-Ac is incorporated into PM6:eC9 blend as the third component, and the optimal ternary device produces a superior PCE of 20.28%. This work highlights the potential of promoting luminescence for suppressing nonradiative energy loss and charts a viable path for upcoming breakthrough in high-efficiency organic photovoltaics.

Angewandte Chemie International EditionVol. 64(24)
Linköping University (SE), Shandong University (CN), Chinese University of Hong Kong (HK), Donghua University (CN), Dongguan University of Technology (CN), Chinese University of Hong Kong, Shenzhen (CN), Centre of Excellence for Advanced Materials (CN), National Center for Nanoscience and Technology (CN), State Key Laboratory of Crystal Materials, Beihang University (CN), Xi'an Jiaotong University (CN)
Affordable and clean energy
Openalex Percentile: Top 1%
Organic Electronics and Photovoltaics
15.34
DOISourceOpenAlex
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