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
Book Volume: 11
Article Number: 6005
Journal Issue: 1
DOI: 10.1038/s41467-020-19853-z
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.
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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