A guest-assisted molecular-organization approach for >17% efficiency organic solar cells using environmentally friendly solvents

Haiyang Chen, Rui Zhang, Xiaobin Chen, Guang Zeng, Libor Kobera, Sabina Abbrent, Ben Zhang, Weijie Chen, Guiying Xu, Jiyeon Oh, So-Huei Kang, Shanshan Chen, Changduk Yang, Jiri Brus, Jianhui Hou, Feng Gao (), Yaowen Li () and Yongfang Li
Additional contact information
Haiyang Chen: Soochow University
Rui Zhang: Linköping University
Xiaobin Chen: Soochow University
Guang Zeng: Soochow University
Libor Kobera: Institute of Macromolecular Chemistry of the Czech Academy of Sciences
Sabina Abbrent: Institute of Macromolecular Chemistry of the Czech Academy of Sciences
Ben Zhang: Soochow University
Weijie Chen: Soochow University
Guiying Xu: Soochow University
Jiyeon Oh: Ulsan National Institute of Science and Technology (UNIST)
So-Huei Kang: Ulsan National Institute of Science and Technology (UNIST)
Shanshan Chen: Chongqing University
Changduk Yang: Ulsan National Institute of Science and Technology (UNIST)
Jiri Brus: Institute of Macromolecular Chemistry of the Czech Academy of Sciences
Jianhui Hou: Chinese Academy of Sciences
Feng Gao: Linköping University
Yaowen Li: Soochow University
Yongfang Li: Soochow University

Nature Energy, 2021, vol. 6, issue 11, 1045-1053

Abstract: Abstract The power conversion efficiencies (PCEs) of laboratory-sized organic solar cells (OSCs), usually processed from low-boiling-point and toxic solvents, have reached high values of over 18%. However, there is usually a notable drop of the PCEs when green solvents are used, limiting practical development of OSCs. Herein, we obtain certificated PCEs over 17% in OSCs processed from a green solvent paraxylene (PX) by a guest-assisted assembly strategy, where a third component (guest) is employed to manipulate the molecular interaction of the binary blend. In addition, the high-boiling-point green solvent PX also enables us to deposit a uniform large-area module (36 cm2) with a high efficiency of over 14%. The strong molecular interaction between the host and guest molecules also enhances the operational stability of the devices. Our guest-assisted assembly strategy provides a unique approach to develop large-area and high-efficiency OSCs processed from green solvents, paving the way for industrial development of OSCs.

Date: 2021
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DOI: 10.1038/s41560-021-00923-5

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