Unraveling the influence of non-fullerene acceptor molecular packing on photovoltaic performance of organic solar cells

Ye L, Weng K, Xu J, Du X, Chandrabose S, Chen K, Zhou J, Han G, Tan S, Xie Z, Yi Y, Li N, Liu F, Hodgkiss JM, Brabec C, Sun Y (2020)


Publication Type: Journal article

Publication year: 2020

Journal

Book Volume: 11

Article Number: 6005

Journal Issue: 1

DOI: 10.1038/s41467-020-19853-z

Abstract

In non-fullerene organic solar cells, the long-range structure ordering induced by end-group π–π stacking of fused-ring non-fullerene acceptors is considered as the critical factor in realizing efficient charge transport and high power conversion efficiency. Here, we demonstrate that side-chain engineering of non-fullerene acceptors could drive the fused-ring backbone assembly from a π–π stacking mode to an intermixed packing mode, and to a non-stacking mode to refine its solid-state properties. Different from the above-mentioned understanding, we find that close atom contacts in a non-stacking mode can form efficient charge transport pathway through close side atom interactions. The intermixed solid-state packing motif in active layers could enable organic solar cells with superior efficiency and reduced non-radiative recombination loss compared with devices based on molecules with the classic end-group π–π stacking mode. Our observations open a new avenue in material design that endows better photovoltaic performance.

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APA:

Ye, L., Weng, K., Xu, J., Du, X., Chandrabose, S., Chen, K.,... Sun, Y. (2020). Unraveling the influence of non-fullerene acceptor molecular packing on photovoltaic performance of organic solar cells. Nature Communications, 11(1). https://doi.org/10.1038/s41467-020-19853-z

MLA:

Ye, Linglong, et al. "Unraveling the influence of non-fullerene acceptor molecular packing on photovoltaic performance of organic solar cells." Nature Communications 11.1 (2020).

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