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Rationally pairing photoactive materials for high-performance polymer solar cells with efficiency of 16.53%

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Abstract

The emergence of non-fullerene acceptors (NFA) offers a promising opportunity to develop high-performance donor/acceptor pairs with high power conversion efficiency, as NFAs offer tunable energy levels, broad absorption and suitable aggregation property. In order to enhance light-harvesting capability of active layers, we choose a wide bandgap polymer PTQ10 as the donor to blend with a narrow bandgap NFA Y6 as the acceptor. In comparison with PTQ10:IDIC blend, ~130 nm red-shifted absorption spectrum is observed in the PTQ10:Y6 blend, which potentially enhance the short-circuit current density (Jsc) for the PSCs. In addition, the optimal PTQ10:Y6 blend shows higher photoluminescence quenching efficiency and more efficient charge separation, higher charge mobilities, as well as weaker bimolecular recombination over the PTQ10:IDIC blend, which leads to an outstanding power conversion efficiency (PCE) of 16.53%, with a notable Jsc of 26.65 mA cm−2 and fill factor (FF) of 0.751.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (51873140, 51603136, 91633301).

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Authors and Affiliations

  1. Laboratory of Advanced Optoelectronic Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, China

    Yue Wu, Yan Zheng, Hang Yang, Yingying Dong, Chaohua Cui & Yongfang Li

  2. CAS Research/Education Center for Excellence in Molecular Sciences, CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China

    Chenkai Sun & Yongfang Li

  3. Department of Chemistry, Energy Institute and Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, Hong Kong University of Science and Technology, Clear Water Bay Kowloon, Hong Kong, China

    He Yan

Authors
  1. Yue Wu
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  2. Yan Zheng
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  3. Hang Yang
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  4. Chenkai Sun
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  5. Yingying Dong
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  6. Chaohua Cui
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  7. He Yan
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  8. Yongfang Li
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Correspondence to Chaohua Cui or Yongfang Li.

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Wu, Y., Zheng, Y., Yang, H. et al. Rationally pairing photoactive materials for high-performance polymer solar cells with efficiency of 16.53%. Sci. China Chem. 63, 265–271 (2020). https://doi.org/10.1007/s11426-019-9599-1

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