- Power conversion efficiencies of donor/acceptor organic solar cells utilizing nonfullerene acceptors have now increased beyond the record of their fullerene-based counterparts. There remain many fundamental questions regarding nanomorphology, interfacial states, charge generation and extraction, and losses in these systems. Herein, we present a comparative study of bulk heterojunction solar cells composed of a recently introduced naphthothiadiazole-based polymer (NT812) as the electron donor and two different acceptor molecules, namely, [6,6]-phenyl-C71-butyric acid methyl ester (PCBM)[70] and 3,9-bis(2-methylene-(3-(1,1-dicyanomethylene)-indanone))-5,5,11,11-tetrakis(4-hexylphenyl)-dithieno[2,3-d:2′,3′-d′]-s-indaceno[1,2-b:5,6-b′]dithiophene (ITIC). A comparison between the photovoltaic performance of these two types of solar cells reveals that the open-circuit voltage (Voc) of the NT812:ITIC-based solar cell is larger, but the fill factor (FF) is lower than that of the NT812:PCBM[70] device. We find the key reason behind thisPower conversion efficiencies of donor/acceptor organic solar cells utilizing nonfullerene acceptors have now increased beyond the record of their fullerene-based counterparts. There remain many fundamental questions regarding nanomorphology, interfacial states, charge generation and extraction, and losses in these systems. Herein, we present a comparative study of bulk heterojunction solar cells composed of a recently introduced naphthothiadiazole-based polymer (NT812) as the electron donor and two different acceptor molecules, namely, [6,6]-phenyl-C71-butyric acid methyl ester (PCBM)[70] and 3,9-bis(2-methylene-(3-(1,1-dicyanomethylene)-indanone))-5,5,11,11-tetrakis(4-hexylphenyl)-dithieno[2,3-d:2′,3′-d′]-s-indaceno[1,2-b:5,6-b′]dithiophene (ITIC). A comparison between the photovoltaic performance of these two types of solar cells reveals that the open-circuit voltage (Voc) of the NT812:ITIC-based solar cell is larger, but the fill factor (FF) is lower than that of the NT812:PCBM[70] device. We find the key reason behind this reduced FF in the ITIC-based device to be faster nongeminate recombination relative to the NT812:PCBM[70] system.…
MetadatenAuthor details: | Seyed Mehrdad HosseiniORCiDGND, Steffen RolandORCiDGND, Jona KurpiersORCiDGND, Zhiming Chen, Kai ZhangORCiD, Fei HuangORCiD, Ardalan ArminORCiD, Dieter NeherORCiDGND, Safa ShoaeeORCiDGND |
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DOI: | https://doi.org/10.1021/acs.jpcc.8b11669 |
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ISSN: | 1932-7447 |
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Title of parent work (English): | The journal of physical chemistry : C, Nanomaterials and interfaces |
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Subtitle (English): | A Comparative Study of Charge Generation and Extraction |
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Publisher: | American Chemical Society |
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Place of publishing: | Washington |
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Publication type: | Article |
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Language: | English |
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Date of first publication: | 2019/02/20 |
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Publication year: | 2019 |
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Release date: | 2021/03/15 |
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Volume: | 123 |
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Issue: | 11 |
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Number of pages: | 8 |
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First page: | 6823 |
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Last Page: | 6830 |
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Funding institution: | Alexander von Humboldt Foundation (Sofja Kovalevskaja award); German Ministry of Science and Education (BMBF) within the project UNVEIL [FKZ 13N13719]; Deutsche Forschungsgesellschaft (DFG)German Research Foundation (DFG) [NE 410/13-1, NE410/15-1, INST 336/94-1 FUGG] |
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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 / Green Open-Access |
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