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

0548193 - ÚMCH 2022 RIV GB eng J - Journal Article
Chen, H. - Zhang, R. - Chen, X. - Zeng, G. - Kobera, Libor - Abbrent, Sabina - Zhang, B. - Chen, W. - Xu, G. - Oh, J. - Kang, S.-H. - Chen, S. - Yang, C. - Brus, Jiří - Hou, J. - Gao, F. - Li, Ya. - Li, Yo.
A guest-assisted molecular-organization approach for >17% efficiency organic solar cells using environmentally friendly solvents.
Nature Energy. Roč. 6, November (2021), s. 1045-1053. ISSN 2058-7546. E-ISSN 2058-7546
R&D Projects: GA ČR(CZ) GA18-12925S
Institutional support: RVO:61389013
Keywords : organic solar cells * green solvents * large-area module
OECD category: Polymer science
Impact factor: 67.439, year: 2021
Method of publishing: Limited access
https://www.nature.com/articles/s41560-021-00923-5

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.
Permanent Link: http://hdl.handle.net/11104/0325226