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

Bin Liu, Huiliang Sun (), Jin-Woo Lee, Zhengyan Jiang, Junqin Qiao, Junwei Wang, Jie Yang, Kui Feng, Qiaogan Liao, Mingwei An, Bolin Li, Dongxue Han, Baomin Xu, Hongzhen Lian, Li Niu (), Bumjoon J. Kim () and Xugang Guo ()
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Bin Liu: Guangzhou University
Huiliang Sun: Guangzhou University
Jin-Woo Lee: Korea Advanced Institute of Science and Technology (KAIST)
Zhengyan Jiang: Southern University of Science and Technology
Junqin Qiao: Nanjing University
Junwei Wang: Southern University of Science and Technology
Jie Yang: Southern University of Science and Technology
Kui Feng: Southern University of Science and Technology
Qiaogan Liao: Southern University of Science and Technology
Mingwei An: Southern University of Science and Technology
Bolin Li: Southern University of Science and Technology
Dongxue Han: Guangzhou University
Baomin Xu: Southern University of Science and Technology
Hongzhen Lian: Nanjing University
Li Niu: Guangzhou University
Bumjoon J. Kim: Korea Advanced Institute of Science and Technology (KAIST)
Xugang Guo: Southern University of Science and Technology

Nature Communications, 2023, vol. 14, issue 1, 1-12

Abstract: Abstract 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.

Date: 2023
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DOI: 10.1038/s41467-023-36413-3

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