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231226s2024 xx |||||o 00| ||eng c |
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|a 10.1002/adma.202310046
|2 doi
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|a pubmed25n1215.xml
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|a (DE-627)NLM364854863
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|a (NLM)37994223
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|a eng
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|a Lv, Min
|e verfasserin
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|a Strengthening the Hetero-Molecular Interactions in Giant Dimeric Acceptors Enables Efficient Organic Solar Cells
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|c 2024
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|a Text
|b txt
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Revised 25.01.2024
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2023 Wiley-VCH GmbH.
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|a Giant dimeric acceptor (G-Dimer) is becoming one of the most promising organic solar cell (OSC) materials because of its definite structure, long-term stability, and high efficiency. Strengthening the hetero-molecular interactions by monomer modification greatly influences the morphology and thus the device performance, but lacks investigation. Herein, two novel quinoxaline core-based G-Dimers, Dimer-QX and Dimer-2CF, are synthesized. By comparing trifluoromethyl-substituted Dimer-2CF and non-substituted Dimer-QX, the trifluoromethylation effect on the G-Dimer is investigated and revealed. The trifluoromethyl with strong electronegativity increases electrostatic potential and reduces surface energy of the G-Dimer, weakening the homo-molecular ordered packing but reinforcing the hetero-molecular interaction with the donor. The strong hetero-molecular interaction suppresses the fast assembly during the film formation, facilitating small domains with ordered molecular packing in the blend, which is a trade-off in conventional morphology control. Together with favorable vertical phase separation, efficient charge generation, and reduced bimolecular recombination are concurrently obtained. Hence, the Dimer-2CF-based OSCs obtain a cutting-edge efficiency of 19.02% with fill factor surpassing 80%, and an averaged extrapolated T80 of ≈12 000 h under continuous 80 °C heating. This study emphasizes the importance of hetero-molecular interaction and trifluoromethylation strategy, providing a facile strategy for designing highly efficient and stable OSC materials
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|a Journal Article
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|a G-Dimers
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|a hetero-molecular interaction
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|a organic solar cells
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|a stability
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|a trifluoromethylation
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|a Wang, Qingyuan
|e verfasserin
|4 aut
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| 700 |
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|a Zhang, Jianqi
|e verfasserin
|4 aut
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|a Wang, Yuheng
|e verfasserin
|4 aut
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| 700 |
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|a Zhang, Zhi-Guo
|e verfasserin
|4 aut
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|a Wang, Tong
|e verfasserin
|4 aut
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|a Zhang, Hao
|e verfasserin
|4 aut
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|a Lu, Kun
|e verfasserin
|4 aut
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|a Wei, Zhixiang
|e verfasserin
|4 aut
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| 700 |
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|a Deng, Dan
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Advanced materials (Deerfield Beach, Fla.)
|d 1998
|g 36(2024), 4 vom: 30. Jan., Seite e2310046
|w (DE-627)NLM098206397
|x 1521-4095
|7 nnas
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| 773 |
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|g volume:36
|g year:2024
|g number:4
|g day:30
|g month:01
|g pages:e2310046
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|u http://dx.doi.org/10.1002/adma.202310046
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