Lijia Fang, Felix Holzmueller, Tomas Matulaitis, Anne Baasner, Christoph Hauenstein, Johannes Benduhn, Martin Schwarze, Annett Petrich, Fortunato Piersimoni, Reinhard Scholz, Olaf Zeika, Christian Koerner, Dieter Neher, Koen Vandewal, Karl Leo
- Fluorine-containing donor molecules TFTF, CNTF and PRTF are designed and isomer selectively synthesized for application in vacuum-deposited organic solar cells. These molecules comprise a donor acceptor molecular architecture incorporating thiophene and benzothiadiazole derivatives as the electron-donating and electron-withdrawing moieties, respectively. As opposed to previously reported materials from this class, PRTF can be purified by vacuum sublimation at moderate to high yields because of its higher volatility and better stabilization due to a stronger intramolecular hydrogen bond, as compared to TFTF and CNTF. The UV-vis absorption spectra of the three donors show an intense broadband absorption between 500 nm and 800 nm with, similar positions of their frontier energy levels. The photophysical properties of the three donor molecules are thoroughly tested and optimized in bulk heterojunction solar cells with C-60 as acceptor. PRTF shows the best performance, yielding power conversion efficiencies of up to 3.8%. Moreover, theFluorine-containing donor molecules TFTF, CNTF and PRTF are designed and isomer selectively synthesized for application in vacuum-deposited organic solar cells. These molecules comprise a donor acceptor molecular architecture incorporating thiophene and benzothiadiazole derivatives as the electron-donating and electron-withdrawing moieties, respectively. As opposed to previously reported materials from this class, PRTF can be purified by vacuum sublimation at moderate to high yields because of its higher volatility and better stabilization due to a stronger intramolecular hydrogen bond, as compared to TFTF and CNTF. The UV-vis absorption spectra of the three donors show an intense broadband absorption between 500 nm and 800 nm with, similar positions of their frontier energy levels. The photophysical properties of the three donor molecules are thoroughly tested and optimized in bulk heterojunction solar cells with C-60 as acceptor. PRTF shows the best performance, yielding power conversion efficiencies of up to 3.8%. Moreover, the voltage loss for the PRTF device due to the non radiative recombination of free charge carriers is exceptionally low (0.26 V) as compared to typical values for organic solar cells (>0.34V). (C) 2016 Published by Elsevier B.V.…
MetadatenAuthor details: | Lijia Fang, Felix Holzmueller, Tomas Matulaitis, Anne Baasner, Christoph Hauenstein, Johannes Benduhn, Martin Schwarze, Annett PetrichORCiDGND, Fortunato Piersimoni, Reinhard Scholz, Olaf Zeika, Christian Koerner, Dieter NeherORCiDGND, Koen Vandewal, Karl LeoORCiD |
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DOI: | https://doi.org/10.1016/j.synthmet.2016.10.025 |
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ISSN: | 0379-6779 |
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Title of parent work (English): | Synthetic metals : the journal of electronic polymers and electronic molecular materials |
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Publisher: | Elsevier |
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Place of publishing: | Lausanne |
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Publication type: | Article |
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Language: | English |
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Year of first publication: | 2016 |
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Publication year: | 2016 |
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Release date: | 2020/03/22 |
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Tag: | (Z)-isomer; CH center dot center dot center dot F hydrogen bonds; Donor materials; Low voltage losses; Sublimation with good yield |
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Volume: | 222 |
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Number of pages: | 8 |
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First page: | 232 |
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Last Page: | 239 |
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Funding institution: | BMBF [LOTsE/03EK3505D, FKZ 03IPT602X]; Deutsche Forschungsgemeinschaft (DFG) [SFB 951] |
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Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie |
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Peer review: | Referiert |
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