Issue 6, 2022

Molecular optimization of incorporating pyran fused acceptor–donor–acceptor type acceptors enables over 15% efficiency in organic solar cells

Abstract

A series of acceptor–donor–acceptor type fused-ring non-fullerene acceptors, FOR-IN, FOR-1F and FOR-2F, were designed and synthesized, featuring the same pyran-composed backbone and different fluorine-substituted 1,1-dicyanomethylene-3-indanone terminals. The increased fluorine substitution in FOR-2F enhances its light harvesting capacity and electron mobility significantly, compared with the molecules FOR-IN and FOR-1F. With FOR-2F as the acceptor and the matching polymeric PM6 as the donor, their organic solar cells demonstrate a high performance of up to 15.18% power conversion efficiency. This is the highest performance reported to date for all pyran fused NFAs. In addition, the fluorine number- and location-induced variations of electronic property, charge transport, film morphology and photovoltaic property were investigated systematically.

Graphical abstract: Molecular optimization of incorporating pyran fused acceptor–donor–acceptor type acceptors enables over 15% efficiency in organic solar cells

Supplementary files

Article information

Article type
Communication
Submitted
02 dec 2021
Accepted
07 jan 2022
First published
07 jan 2022

J. Mater. Chem. C, 2022,10, 1977-1983

Molecular optimization of incorporating pyran fused acceptor–donor–acceptor type acceptors enables over 15% efficiency in organic solar cells

S. Wu, L. Meng, Z. Zhang, M. Li, Y. Yang, J. Wang, H. Chen, C. Jiang, X. Wan, C. Li, Z. Yao and Y. Chen, J. Mater. Chem. C, 2022, 10, 1977 DOI: 10.1039/D1TC05779K

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