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Tandem organic solar cells with efficiency over 19% via the careful subcell design and optimization

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Abstract

The series-connected tandem device strategy is an effective approach to promote the efficiency of organic solar cells (OSCs) with broadened absorption range and alleviated thermalization and transmission loss. In this article, two nonfullerene acceptors, FBr-ThCl and BTP-4Se, with complementary absorptions covering the range from 300 to 1,000 nm were designed and synthesized for the front and rear cell, respectively. The front cell based on D18:FBr-ThCl exhibited a Voc of 1.053 V with high external quantum efficiency (EQE) response values ranging from 300 to 740 nm. The rear cell with a ternary active layer PM6:BTP-4Se: F-2F was optimized and afforded the Voc of 0.840 V and Jsc of 26.88 mA cm−2. Subsequently, the tandem device was constructed with a fully solution-processed interconnected layer of ZnO/PEDOT:PSS/PMA, and demonstrated a power conversion efficiency (PCE) of 19.55% with a Voc of 1.880 V, a Jsc of 13.25 mA cm−2 and an FF of 78.47%.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (52025033, 21935007), the Ministry of Science and Technology of China (2022YFB4200400, 2019YFA0705900), the Tianjin City (20JCZDJC00740) and 111 Project (B12015).

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  1. These authors contributed equally to this work.

Authors and Affiliations

  1. State Key Laboratory and Institute of Elemento-Organic Chemistry, Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer Materials, College of Chemistry, Nankai University, Tianjin, 300071, China

    Lingxian Meng, Huazhe Liang, Guangkun Song, Mingpeng Li, Yuzhong Huang, Changzun Jiang, Zhaoyang Yao, Chenxi Li, Xiangjian Wan & Yongsheng Chen

  2. State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640, China

    Kai Zhang & Fei Huang

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  1. Lingxian Meng
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Correspondence to Xiangjian Wan or Yongsheng Chen.

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Supporting information The supporting information is available online at chem.scichina.com and link.springer.com/journal/11426. The supporting materials are published as submitted, without typesetting or editing. The responsibility for scientific accuracy and content remains entirely with the authors.

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Meng, L., Liang, H., Song, G. et al. Tandem organic solar cells with efficiency over 19% via the careful subcell design and optimization. Sci. China Chem. 66, 808–815 (2023). https://doi.org/10.1007/s11426-022-1479-x

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  • DOI: https://doi.org/10.1007/s11426-022-1479-x

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