Tian-yi Li, Johannes Benduhn, Zhi Qiao, Yuan Liu, Yue Li, Rishi Shivhare, Frank Jaiser, Pei Wang, Jie Ma, Olaf Zeika, Dieter Neher, Stefan C. B. Mannsfeld, Zaifei Ma, Koen Vandewal, Karl Leo
- An understanding of the factors limiting the open-circuit voltage (V-oc) and related photon energy loss mechanisms is critical to increase the power conversion efficiency (PCE) of small-molecule organic solar cells (OSCs), especially those with near-infrared (NIR) absorbers. In this work, two NIR boron dipyrromethene (BODIPY) molecules are characterized for application in planar (PHJ) and bulk (BHJ) heterojunction OSCs. When two H atoms are substituted by F atoms on the peripheral phenyl rings of the molecules, the molecular aggregation type in the thin film changes from the H-type to J-type. For PHJ devices, the nonradiative voltage loss of 0.35 V in the J-aggregated BODIPY is lower than that of 0.49 V in the H-aggregated device. In BHJ devices with a nonradiative voltage loss of 0.35 V, a PCE of 5.5% is achieved with an external quantum efficiency (EQE) maximum of 68% at 700 nm.
MetadatenAuthor details: | Tian-yi LiORCiD, Johannes BenduhnORCiD, Zhi Qiao, Yuan Liu, Yue Li, Rishi ShivhareORCiD, Frank JaiserORCiD, Pei WangORCiD, Jie Ma, Olaf Zeika, Dieter NeherORCiDGND, Stefan C. B. MannsfeldORCiD, Zaifei MaORCiD, Koen VandewalORCiD, Karl LeoORCiD |
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DOI: | https://doi.org/10.1021/acs.jpclett.9b01222 |
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ISSN: | 1948-7185 |
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Pubmed ID: | https://pubmed.ncbi.nlm.nih.gov/31066274 |
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Title of parent work (English): | The journal of physical chemistry letters |
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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: | 2019/05/08 |
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Publication year: | 2019 |
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Release date: | 2021/01/25 |
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Volume: | 10 |
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Issue: | 11 |
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Number of pages: | 15 |
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First page: | 2684 |
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Last Page: | 2691 |
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Funding institution: | China Scholarship CouncilChina Scholarship Council [201406190164]; Donghua University; German Federal Ministry for Education and Research (BMBF) through the InnoProfile project "Organische p-i-n Bauelemente 2.2"Federal Ministry of Education & Research (BMBF) [03IPT602X]; BMBF through the project UNVEIL [13N13719]; Canadian Institute for Advanced Research (CIFAR)Canadian Institute for Advanced Research (CIFAR) |
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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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