Niva A. Ran, Steffen Roland, John A. Love, Victoria Savikhin, Christopher J. Takacs, Yao-Tsung Fu, Hong Li, Veaceslav Coropceanu, Xiaofeng Liu, Jean-Luc Bredas, Guillermo C. Bazan, Michael F. Toney, Dieter Neher, Thuc-Quyen Nguyen
- A long standing question in organic electronics concerns the effects of molecular orientation at donor/acceptor heterojunctions. Given a well-controlled donor/acceptor bilayer system, we uncover the genuine effects of molecular orientation on charge generation and recombination. These effects are studied through the point of view of photovoltaics-however, the results have important implications on the operation of all optoelectronic devices with donor/ acceptor interfaces, such as light emitting diodes and photodetectors. Our findings can be summarized by two points. First, devices with donor molecules face-on to the acceptor interface have a higher charge transfer state energy and less non-radiative recombination, resulting in larger open-circuit voltages and higher radiative efficiencies. Second, devices with donor molecules edge-on to the acceptor interface are more efficient at charge generation, attributed to smaller electronic coupling between the charge transfer states and the ground state, and lower activation energy forA long standing question in organic electronics concerns the effects of molecular orientation at donor/acceptor heterojunctions. Given a well-controlled donor/acceptor bilayer system, we uncover the genuine effects of molecular orientation on charge generation and recombination. These effects are studied through the point of view of photovoltaics-however, the results have important implications on the operation of all optoelectronic devices with donor/ acceptor interfaces, such as light emitting diodes and photodetectors. Our findings can be summarized by two points. First, devices with donor molecules face-on to the acceptor interface have a higher charge transfer state energy and less non-radiative recombination, resulting in larger open-circuit voltages and higher radiative efficiencies. Second, devices with donor molecules edge-on to the acceptor interface are more efficient at charge generation, attributed to smaller electronic coupling between the charge transfer states and the ground state, and lower activation energy for charge generation.…
MetadatenVerfasserangaben: | Niva A. Ran, Steffen RolandORCiDGND, John A. Love, Victoria Savikhin, Christopher J. Takacs, Yao-Tsung Fu, Hong Li, Veaceslav Coropceanu, Xiaofeng LiuORCiD, Jean-Luc Bredas, Guillermo C. Bazan, Michael F. Toney, Dieter NeherORCiDGND, Thuc-Quyen Nguyen |
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DOI: | https://doi.org/10.1038/s41467-017-00107-4 |
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ISSN: | 2041-1723 |
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Pubmed ID: | https://pubmed.ncbi.nlm.nih.gov/28724989 |
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Titel des übergeordneten Werks (Englisch): | Nature Communications |
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Verlag: | Nature Publ. Group |
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Verlagsort: | London |
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Publikationstyp: | Wissenschaftlicher Artikel |
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Sprache: | Englisch |
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Jahr der Erstveröffentlichung: | 2017 |
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Erscheinungsjahr: | 2017 |
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Datum der Freischaltung: | 20.04.2020 |
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Band: | 8 |
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Seitenanzahl: | 9 |
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Fördernde Institution: | Department of the Navy, Office of Naval Research [N00014-14-1-0580]; MRSEC Program of the NSF [DMR 1121053]; NSF; German Ministry of Science and Education (Project UNVEIL) [FKZ 13N13719]; Deutsche Forschungsgesellschaft [INST 336/94-1 FUGG] |
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Organisationseinheiten: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie |
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Peer Review: | Referiert |
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