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Planarized Polymer Acceptor Featuring High Electron Mobility for Efficient All-Polymer Solar Cells

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Abstract

Significant progress has been achieved for all-polymer solar cells (APSCs) in the last few years by the use of polymerized small molecular acceptors (PSMAs). Developing high electron mobility polymer acceptors has been considered a feasible solution to further improve the photovoltaic performance of APSCs and fabricate thick film devices, which contributed to roll-to-roll printing techniques. In this work, we designed and synthesized PSV, an A-DA’D-A small molecule acceptor-based PSMA with the vinyl group as a bridged linkage to reduce the steric hindrance between the 1,1-dicyanomethylene-3-indanone (IC) terminal group. In comparison with the C-C bond linked polymer acceptor PS, PSV exhibits an almost planar conjugated framework and well-ordered molecular stacking in the thin film. Moreover, PSV exhibits superior n-type semiconducting properties with high electron mobility of up to 0.54 cm2·V−1·s−1, which is the highest value among reported PSMAs. By utilizing PM6 as a polymer donor, PSV-based blend forms a favorable nanomorphology and exhibits high and well-balanced hole/electron mobilities, which is beneficial for exciton separation and charge transport. Consequently, APSCs based on PM6:PSV achieved high power conversion efficiencies of up to 15.73%, with a simultaneously realized high Voc of 0.923 V, Jsc of 23.2 mA·cm−2, and FF of 0.734. Such superior features enable PSV with excellent thickness-insensitive properties and over 13% PCE was obtained at 300 nm. To the best of our knowledge, the high PCE of 15.73% with excellent electron mobility of 0.54 cm2·V−1·s−1 is the highest values reported for APSCs. These results point to the great significance of developing polymer acceptors with a high electron mobility for boosting the performance of APSCs.

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Acknowledgments

This work was financially supported by the National Natural Science Foundation of China (Nos. 21905163, 91833304, 21805289, 91833306, 21922511, 61890940 and U2032112) and the National Key R&D Program of China (Nos. 2019YFA0705900 and 2017YFA0204701). F. L. is grateful for support from the Program for the Outstanding Innovative Teams of Higher Learning Institutions of Shanxi (No. 2019-07), Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi (No. 2019L0009), and the Youth Science Foundation of Shanxi Province (No. 201901D211149).

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Authors and Affiliations

  1. School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, 030006, China

    Feng Liu, Ri Sun, Shuai Sun & Li-Heng Feng

  2. Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China

    Feng Liu, Cheng-Yu Wang, Qi-Hui Yue, Wu-Yue Liu, Hai-Jun Fan, Yun-Long Guo & Xiao-Zhang Zhu

  3. Department of Physics and Applied Optics Beijing Area Major Laboratory, Center for Advanced Quantum Studies, Beijing Normal University, Beijing, 100875, China

    Liang Zhou, Wen-Li Su & Wen-Kai Zhang

  4. University of Chinese Academy of Sciences, Beijing, 100049, China

    Cheng-Yu Wang, Qi-Hui Yue, Wu-Yue Liu, Yun-Long Guo & Xiao-Zhang Zhu

Authors
  1. Feng Liu
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  2. Ri Sun
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  3. Cheng-Yu Wang
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  4. Liang Zhou
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  5. Wen-Li Su
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  6. Qi-Hui Yue
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  7. Shuai Sun
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  8. Wu-Yue Liu
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  9. Hai-Jun Fan
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  10. Wen-Kai Zhang
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  11. Yun-Long Guo
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  12. Li-Heng Feng
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  13. Xiao-Zhang Zhu
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Corresponding authors

Correspondence to Feng Liu, Wen-Kai Zhang, Yun-Long Guo, Li-Heng Feng or Xiao-Zhang Zhu.

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Notes

The authors declare no competing financial interest.

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Liu, F., Sun, R., Wang, CY. et al. Planarized Polymer Acceptor Featuring High Electron Mobility for Efficient All-Polymer Solar Cells. Chin J Polym Sci 40, 968–978 (2022). https://doi.org/10.1007/s10118-022-2767-4

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  • DOI: https://doi.org/10.1007/s10118-022-2767-4

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