Sascha Ullbrich, Johannes Benduhn, Xiangkun Jia, Vasileios C. Nikolis, Kristofer Tvingstedt, Fortunato Piersimoni, Steffen Roland, Yuan Liu, Jinhan Wu, Axel Fischer, Dieter Neher, Sebastian Reineke, Donato Spoltore, Koen Vandewal
- Intermolecular charge-transfer states at the interface between electron donating (D) and accepting (A) materials are crucial for the operation of organic solar cells but can also be exploited for organic light-emitting diodes(1,2). Non-radiative charge-transfer state decay is dominant in state-of-the-art D-A-based organic solar cells and is responsible for large voltage losses and relatively low power-conversion efficiencies as well as electroluminescence external quantum yields in the 0.01-0.0001% range(3,4). In contrast, the electroluminescence external quantum yield reaches up to 16% in D-A-based organic light-emitting diodes(5-7). Here, we show that proper control of charge-transfer state properties allows simultaneous occurrence of a high photovoltaic and emission quantum yield within a single, visible-light-emitting D-A system. This leads to ultralow-emission turn-on voltages as well as significantly reduced voltage losses upon solar illumination. These results unify the description of the electro-optical properties ofIntermolecular charge-transfer states at the interface between electron donating (D) and accepting (A) materials are crucial for the operation of organic solar cells but can also be exploited for organic light-emitting diodes(1,2). Non-radiative charge-transfer state decay is dominant in state-of-the-art D-A-based organic solar cells and is responsible for large voltage losses and relatively low power-conversion efficiencies as well as electroluminescence external quantum yields in the 0.01-0.0001% range(3,4). In contrast, the electroluminescence external quantum yield reaches up to 16% in D-A-based organic light-emitting diodes(5-7). Here, we show that proper control of charge-transfer state properties allows simultaneous occurrence of a high photovoltaic and emission quantum yield within a single, visible-light-emitting D-A system. This leads to ultralow-emission turn-on voltages as well as significantly reduced voltage losses upon solar illumination. These results unify the description of the electro-optical properties of charge-transfer states in organic optoelectronic devices and foster the use of organic D-A blends in energy conversion applications involving visible and ultraviolet photons(8-11).…
MetadatenAuthor details: | Sascha Ullbrich, Johannes BenduhnORCiD, Xiangkun Jia, Vasileios C. Nikolis, Kristofer TvingstedtORCiD, Fortunato Piersimoni, Steffen RolandORCiDGND, Yuan Liu, Jinhan Wu, Axel Fischer, Dieter NeherORCiDGND, Sebastian ReinekeORCiD, Donato SpoltoreORCiD, Koen VandewalORCiD |
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DOI: | https://doi.org/10.1038/s41563-019-0324-5 |
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ISSN: | 1476-1122 |
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ISSN: | 1476-4660 |
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Pubmed ID: | https://pubmed.ncbi.nlm.nih.gov/30936478 |
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Title of parent work (English): | Nature materials |
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Publisher: | Nature Publ. Group |
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Place of publishing: | London |
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Publication type: | Article |
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Language: | English |
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Date of first publication: | 2019/04/01 |
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Publication year: | 2019 |
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Release date: | 2021/02/26 |
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Tag: | Electronics, photonics and device physics; Optoelectronic devices and components; Photonic devices; Solar energy and photovoltaic technology |
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Volume: | 18 |
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Issue: | 5 |
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Number of pages: | 7 |
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First page: | 459 |
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Last Page: | 464 |
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Funding institution: | German Federal Ministry for Education and Research (BMBF)Federal Ministry of Education & Research (BMBF) [03IPT602X]; German Research Foundation (DFG)German Research Foundation (DFG) [VA 1035/5-1]; China Scholarship CouncilChina Scholarship Council [201706140127, 201506920047]; DFGGerman Research Foundation (DFG) [382633022, SFB 951, RE 3198/6-1] |
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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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