Monocyclopropanated fullerene derivatives with decreased electron affinity as promising electron acceptor materials for organic solar cells

[Display omitted] •Four novel methanofullerenes F1-F4 with decreased electron affinity are synthesized.•New adducts show better optoelectronic properties compared to [60]PCBM.•Solar cells with F1-F4 demonstrate increase in VOC by >100 mV and PCE.•F1-F4 have good compatibility with the amorphous c...

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Bibliographic Details
Published in:Synthetic metals 2020-12, Vol.270, p.116565, Article 116565
Main Authors: Mumyatov, Alexander V., Goryachev, Andrey E., Prudnov, Fedor A., Mukhacheva, Olga A., Sagdullina, Diana K., Chernyak, Alexander V., Troyanov, Sergey I., Troshin, Pavel A.
Format: Article
Language:English
Subjects:
[3+2]cycloaddition of diazo compounds
Acceptor materials
Affinity
Copolymers
Electron affinity
Electrons
Energy conversion efficiency
Fullerenes
Heterojunctions
Monocyclopropanated fullerene derivatives
N-type semiconductors
Open circuit voltage
Organic solar cell
Oxygen atoms
Photovoltaic cells
Solar cells
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Summary:[Display omitted] •Four novel methanofullerenes F1-F4 with decreased electron affinity are synthesized.•New adducts show better optoelectronic properties compared to [60]PCBM.•Solar cells with F1-F4 demonstrate increase in VOC by >100 mV and PCE.•F1-F4 have good compatibility with the amorphous conjugated polymer PCDTBT. Monocyclopropanated fullerene derivatives with decreased electron affinity as compared to standard [60]PCBM acceptor were synthesized, characterized, and investigated as promising electron acceptor materials for fullerene-based organic solar cells. This decrease in electron affinity was attributed to the presence of through-space electronic interactions between the lone electron pairs of oxygen atoms and electron-deficient π-system of the fullerene cage. Organic bulk heterojunction solar cells based on the designed materials blended with conjugated polymers P3HT and PCDTBT have demonstrated spectacular increase in open-circuit voltage by >100 mV and improved light power conversion efficiency as compared to the reference devices comprising [60]PCBM. The application of new fullerene-based acceptor materials in combination with the promising low band gap conjugated copolymer may deliver competitive device performances.
ISSN:0379-6779
1879-3290
DOI:10.1016/j.synthmet.2020.116565