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A unified descripti...
A unified description of non-radiative voltage losses in organic solar cells
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- Chen, Xian-Kai (author)
- Univ Arizona, AZ 85721 USA
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- Qian, Deping (author)
- Linköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten
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- Wang, Yuming (author)
- Linköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten
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- Kirchartz, Thomas (author)
- Forschungszentrum Julich, Germany; Univ Duisburg Essen, Germany; Univ Duisburg Essen, Germany
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- Tress, Wolfgang (author)
- Zurich Univ Appl Sci, Switzerland
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- Yao, Huifeng (author)
- Chinese Acad Sci, Peoples R China
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- Yuan, Jun (author)
- Linköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten,Cent South Univ, Peoples R China
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- Huelsbeck, Markus (author)
- Forschungszentrum Julich, Germany
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- Zhang, Maojie (author)
- Soochow Univ, Peoples R China
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- Zou, Yingping (author)
- Cent South Univ, Peoples R China
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- Sun, Yanming (author)
- Beihang Univ, Peoples R China
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- Li, Yongfang (author)
- Chinese Acad Sci, Peoples R China; Soochow Univ, Peoples R China
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- Hou, Jianhui (author)
- Chinese Acad Sci, Peoples R China
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- Inganäs, Olle (author)
- Linköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten
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- Coropceanu, Veaceslav (author)
- Univ Arizona, AZ 85721 USA
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- Bredas, Jean-Luc (author)
- Univ Arizona, AZ 85721 USA
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- Gao, Feng (author)
- Linköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten
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(creator_code:org_t)
- 2021-06-07
- 2021
- English.
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In: Nature Energy. - : Springer Nature. - 2058-7546. ; 6:8, s. 799-806
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
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- Organic solar cells based on non-fullerene acceptors have enabled high efficiencies yet their charge dynamics and its impact on the photovoltaic parameters are not fully understood. Now, Chen et al. provide a general description of non-radiative voltage losses in both fullerene and non-fullerene solar cells. Recent advances in organic solar cells based on non-fullerene acceptors (NFAs) come with reduced non-radiative voltage losses (Delta V-nr). Here we show that, in contrast to the energy-gap-law dependence observed in conventional donor:fullerene blends, the Delta V-nr values in state-of-the-art donor:NFA organic solar cells show no correlation with the energies of charge-transfer electronic states at donor:acceptor interfaces. By combining temperature-dependent electroluminescence experiments and dynamic vibronic simulations, we provide a unified description of Delta V-nr for both fullerene- and NFA-based devices. We highlight the critical role that the thermal population of local exciton states plays in low-Delta V-nr systems. An important finding is that the photoluminescence yield of the pristine materials defines the lower limit of Delta V-nr. We also demonstrate that the reduction in Delta V-nr (for example, <0.2 V) can be obtained without sacrificing charge generation efficiency. Our work suggests designing donor and acceptor materials with high luminescence efficiency and complementary optical absorption bands extending into the near-infrared region.
Subject headings
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Chen, Xian-Kai
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Qian, Deping
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Wang, Yuming
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Kirchartz, Thoma ...
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Tress, Wolfgang
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Yao, Huifeng
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show more...
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Yuan, Jun
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Huelsbeck, Marku ...
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Zhang, Maojie
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Zou, Yingping
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Sun, Yanming
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Li, Yongfang
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Hou, Jianhui
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Inganäs, Olle
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Coropceanu, Veac ...
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Bredas, Jean-Luc
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Gao, Feng
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Condensed Matter ...
- Articles in the publication
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Nature Energy
- By the university
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Linköping University