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Stepwise heating in Stille polycondensation toward no batch-to-batch variations in polymer solar cell performance

Author

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  • Sang Myeon Lee

    (Ulsan National Institute of Science and Technology (UNIST))

  • Kwang Hyun Park

    (Ulsan National Institute of Science and Technology (UNIST))

  • Seungon Jung

    (Ulsan National Institute of Science and Technology (UNIST))

  • Hyesung Park

    (Ulsan National Institute of Science and Technology (UNIST))

  • Changduk Yang

    (Ulsan National Institute of Science and Technology (UNIST))

Abstract

For a given π-conjugated polymer, the batch-to-batch variations in molecular weight (Mw) and polydispersity index (Ð) can lead to inconsistent process-dependent material properties and consequent performance variations in the device application. Using a stepwise-heating protocol in the Stille polycondensation in conjunction with optimized processing, we obtained an ultrahigh-quality PTB7 polymer having high Mw and very narrow Ð. The resulting ultrahigh-quality polymer-based solar cells demonstrate up to 9.97% power conversion efficiencies (PCEs), which is over 24% enhancement from the control devices fabricated with commercially available PTB7. Moreover, we observe almost negligible batch-to-batch variations in the overall PCE values from ultrahigh-quality polymer-based devices. The proposed stepwise polymerization demonstrates a facile and effective strategy for synthesizing high-quality semiconducting polymers that can significantly improve device yield in polymer-based solar cells, an important factor for the commercialization of organic solar cells, by mitigating device-to-device variations.

Suggested Citation

  • Sang Myeon Lee & Kwang Hyun Park & Seungon Jung & Hyesung Park & Changduk Yang, 2018. "Stepwise heating in Stille polycondensation toward no batch-to-batch variations in polymer solar cell performance," Nature Communications, Nature, vol. 9(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-03718-7
    DOI: 10.1038/s41467-018-03718-7
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    Cited by:

    1. Lin-Yong Xu & Wei Wang & Xinrong Yang & Shanshan Wang & Yiming Shao & Mingxia Chen & Rui Sun & Jie Min, 2024. "Real-time monitoring polymerization degree of organic photovoltaic materials toward no batch-to-batch variations in device performance," Nature Communications, Nature, vol. 15(1), pages 1-12, December.

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