Design and application of volatilizable solid additives in non-fullerene organic solar cells

Runnan Yu, Huifeng Yao (), Ling Hong, Yunpeng Qin, Jie Zhu, Yong Cui, Sunsun Li and Jianhui Hou ()
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Runnan Yu: Institute of Chemistry, Chinese Academy of Sciences
Huifeng Yao: Institute of Chemistry, Chinese Academy of Sciences
Ling Hong: Institute of Chemistry, Chinese Academy of Sciences
Yunpeng Qin: Institute of Chemistry, Chinese Academy of Sciences
Jie Zhu: Institute of Chemistry, Chinese Academy of Sciences
Yong Cui: Institute of Chemistry, Chinese Academy of Sciences
Sunsun Li: Institute of Chemistry, Chinese Academy of Sciences
Jianhui Hou: Institute of Chemistry, Chinese Academy of Sciences

Nature Communications, 2018, vol. 9, issue 1, 1-9

Abstract: Abstract Most of the high-performance organic solar cells are fabricated with the assistance of high-boiling-point solvent additives to optimize their charge transport properties; this has adverse effects on the OSCs’ stability and reproducibility in large-scale production. Here, we design volatilizable solid additives by considering the molecular structure feature of an acceptor–donor–acceptor-type non-fullerene acceptor. The application of solid additives can enhance the intermolecular π–π stacking of the non-fullerene acceptor and thus facilitate the charge transport properties in the active layers, leading to improved efficiencies of OSCs. Importantly, devices fabricated using volatilizable solid additives exhibit higher stability and reproducibility when compared with the OSCs processed with solvent additives. Our results not only demonstrate an approach of applying volatilizable solid additives to benefit the large-scale production of OSCs but also provide a potential direction for designing specific solid additives for different active layers.

Date: 2018
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DOI: 10.1038/s41467-018-07017-z

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