Lorena Perdigón-Toro, Le Quang Phuong, Fabian Eller, Guillaume Freychet, Elifnaz Saglamkaya, Jafar Khan, Qingya Wei, Stefan Zeiske, Daniel Kroh, Stefan Wedler, Anna Koehler, Ardalan Armin, Frederic Laquai, Eva M. Herzig, Yingping Zou, Safa Shoaee, Dieter Neher
- Non-fullerene acceptors (NFAs) as used in state-of-the-art organic solar cells feature highly crystalline layers that go along with low energetic disorder.
Here, the crucial role of energetic disorder in blends of the donor polymer PM6 with two Y-series NFAs, Y6, and N4 is studied.
By performing temperature-dependent charge transport and recombination studies, a consistent picture of the shape of the density of state distributions for free charges in the two blends is developed, allowing an analytical description of the dependence of the open-circuit voltage V-OC on temperature and illumination intensity.
Disorder is found to influence the value of the V-OC at room temperature, but also its progression with temperature. Here, the PM6:Y6 blend benefits substantially from its narrower state distributions.
The analysis also shows that the energy of the equilibrated free charge population is well below the energy of the NFA singlet excitons for both blends and possibly below the energy of the populated charge transfer manifold,Non-fullerene acceptors (NFAs) as used in state-of-the-art organic solar cells feature highly crystalline layers that go along with low energetic disorder.
Here, the crucial role of energetic disorder in blends of the donor polymer PM6 with two Y-series NFAs, Y6, and N4 is studied.
By performing temperature-dependent charge transport and recombination studies, a consistent picture of the shape of the density of state distributions for free charges in the two blends is developed, allowing an analytical description of the dependence of the open-circuit voltage V-OC on temperature and illumination intensity.
Disorder is found to influence the value of the V-OC at room temperature, but also its progression with temperature. Here, the PM6:Y6 blend benefits substantially from its narrower state distributions.
The analysis also shows that the energy of the equilibrated free charge population is well below the energy of the NFA singlet excitons for both blends and possibly below the energy of the populated charge transfer manifold, indicating a down-hill driving force for free charge formation.
It is concluded that energetic disorder of charge-separated states has to be considered in the analysis of the photovoltaic properties, even for the more ordered PM6:Y6 blend.…
MetadatenAuthor details: | Lorena Perdigón-ToroORCiDGND, Le Quang PhuongORCiD, Fabian Eller, Guillaume Freychet, Elifnaz SaglamkayaORCiD, Jafar Khan, Qingya Wei, Stefan Zeiske, Daniel Kroh, Stefan Wedler, Anna Koehler, Ardalan Armin, Frederic LaquaiORCiD, Eva M. Herzig, Yingping Zou, Safa ShoaeeORCiDGND, Dieter NeherORCiDGND |
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DOI: | https://doi.org/10.1002/aenm.202103422 |
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ISSN: | 1614-6832 |
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ISSN: | 1614-6840 |
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Title of parent work (English): | Advanced energy materials |
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Publisher: | Wiley-VCH |
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Place of publishing: | Weinheim |
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Publication type: | Article |
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Language: | English |
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Date of first publication: | 2022/02/03 |
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Publication year: | 2022 |
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Release date: | 2024/06/12 |
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Tag: | energetic disorder; non-fullerene acceptors; open-circuit voltage; organic solar cells |
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Volume: | 12 |
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Issue: | 12 |
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Article number: | 2103422 |
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Number of pages: | 13 |
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Funding institution: | Alexander von Humboldt Foundation; Deutsche Forschungsgemeinschaft, DFG,; German Research Foundation through the project Fabulous [450968074];; HIOS [182087777 - SFB 951]; SolarEraNet [NFA4R2ROPV]; Elite Study; Program Macromolecular Science within the Elite Network of Bavaria; (ENB); DOE Office of Science by Brookhaven National Laboratory; [DE-SC0012704]; King Abdullah University of Science and Technology; (KAUST) Office of Sponsored Research (OSR) [OSR-CARF/CCF-3079]; National; Natural Science Foundation of China [52125306]; Welsh Government's Ser; Cymru II Rising Star and Capacity Builder Accelerator Programs through; the European Regional Development Fund, Welsh European Funding Office;; Swansea University Strategic Initiative in Sustainable Advanced; Materials; Projekt DEAL; [3923306670] |
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Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie |
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DDC classification: | 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik |
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Peer review: | Referiert |
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Publishing method: | Open Access / Hybrid Open-Access |
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License (German): | CC-BY - Namensnennung 4.0 International |
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