Barrierless Free Charge Generation in the High‐Performance PM6:Y6 Bulk Heterojunction Non‐Fullerene Solar Cell
Abstract: Organic solar cells are currently experiencing a second golden age thanks to the development of novel non‐fullerene acceptors (NFAs). Surprisingly, some of these blends exhibit high efficiencies despite a low energy offset at the heterojunction. Herein, free charge generation in the high‐performance blend of the donor polymer PM6 with the NFA Y6 is thoroughly investigated as a function of internal field, temperature and excitation energy. Results show that photocurrent generation is essentially barrierless with near‐unity efficiency, regardless of excitation energy. Efficient charge separation is maintained over a wide temperature range, down to 100 K, despite the small driving force for charge generation. Studies on a blend with a low concentration of the NFA, measurements of the energetic disorder, and theoretical modeling suggest that CT state dissociation is assisted by the electrostatic interfacial field which for Y6 is large enough to compensate the Coulomb dissociation barrier.
- Location
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Deutsche Nationalbibliothek Frankfurt am Main
- Extent
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Online-Ressource
- Language
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Englisch
- Bibliographic citation
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Barrierless Free Charge Generation in the High‐Performance PM6:Y6 Bulk Heterojunction Non‐Fullerene Solar Cell ; volume:32 ; number:9 ; year:2020 ; extent:9
Advanced materials ; 32, Heft 9 (2020) (gesamt 9)
- Creator
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Perdigón-Toro, Lorena
Zhang, Huotian
Markina, Anastasia
Yuan, Jun
Hosseini, Seyed Mehrdad
Wolff, Christian Michael
Zuo, Guangzheng
Stolterfoht, Martin
Zou, Yingping
Gao, Feng
Andrienko, Denis
Shoaee, Safa
Neher, Dieter
- DOI
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10.1002/adma.201906763
- URN
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urn:nbn:de:101:1-2022062114322803248279
- Rights
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Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
- Last update
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15.08.2025, 7:36 AM CEST
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Associated
- Perdigón-Toro, Lorena
- Zhang, Huotian
- Markina, Anastasia
- Yuan, Jun
- Hosseini, Seyed Mehrdad
- Wolff, Christian Michael
- Zuo, Guangzheng
- Stolterfoht, Martin
- Zou, Yingping
- Gao, Feng
- Andrienko, Denis
- Shoaee, Safa
- Neher, Dieter
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