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Efficient and stable organic solar cells enabled by multicomponent photoactive layer based on one-pot polymerization

Degradation of the kinetically trapped bulk heterojunction film morphology in organic solar cells (OSCs) remains a grand challenge for their practical application. Herein, we demonstrate highly thermally stable OSCs using multicomponent photoactive layer synthesized via a facile one-pot polymerizati...

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Published in:Nature communications 2023-02, Vol.14 (1), p.967-967, Article 967
Main Authors: Liu, Bin, Sun, Huiliang, Lee, Jin-Woo, Jiang, Zhengyan, Qiao, Junqin, Wang, Junwei, Yang, Jie, Feng, Kui, Liao, Qiaogan, An, Mingwei, Li, Bolin, Han, Dongxue, Xu, Baomin, Lian, Hongzhen, Niu, Li, Kim, Bumjoon J., Guo, Xugang
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Language:English
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Summary:Degradation of the kinetically trapped bulk heterojunction film morphology in organic solar cells (OSCs) remains a grand challenge for their practical application. Herein, we demonstrate highly thermally stable OSCs using multicomponent photoactive layer synthesized via a facile one-pot polymerization, which show the advantages of low synthetic cost and simplified device fabrication. The OSCs based on multicomponent photoactive layer deliver a high power conversion efficiency of 11.8% and exhibit excellent device stability for over 1000 h (>80% of their initial efficiency retention), realizing a balance between device efficiency and operational lifetime for OSCs. In-depth opto-electrical and morphological properties characterizations revealed that the dominant PM6- b -L15 block polymers with backbone entanglement and the small fraction of PM6 and L15 polymers synergistically contribute to the frozen fine-tuned film morphology and maintain well-balanced charge transport under long-time operation. These findings pave the way towards the development of low-cost and long-term stable OSCs. Degradation of kinetically bulk heterojunction film morphology in organic solar cells is a grand challenge for their practical application. Here, the authors design and synthesise multicomponent photoactive material by facile one-pot polymerization and achieve efficiency of 11.8% and T80 of 1000 h.
ISSN:2041-1723
2041-1723
DOI:10.1038/s41467-023-36413-3