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Understanding the R...
Understanding the Role of Triplet-Triplet Annihilation in Non-Fullerene Acceptor Organic Solar Cells
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- Hart, Lucy J. F. (author)
- Univ Cambridge, England; Imperial Coll London, England
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- Gruene, Jeannine (author)
- Univ Cambridge, England; Julius Maximilian Univ Wurzburg, Germany
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- Liu, Wei (author)
- Cent South Univ, Peoples R China
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- Lau, Tsz-ki (author)
- Chinese Univ Hong Kong, Peoples R China
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- Luke, Joel (author)
- Imperial Coll London, England
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- Chin, Yi-Chun (author)
- Imperial Coll London, England
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- Jiang, Xinyu (author)
- Tech Univ Munich, Germany
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- Zhang, Huotian (author)
- Linköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten
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- Sowood, Daniel J. C. (author)
- Univ Cambridge, England
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- Unson, Darcy M. L. (author)
- Univ Cambridge, England
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- Kim, Ji-Seon (author)
- Imperial Coll London, England
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- Lu, Xinhui (author)
- Chinese Univ Hong Kong, Peoples R China
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- Zou, Yingping (author)
- Cent South Univ, Peoples R China
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- Gao, Feng (author)
- Linköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten
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- Sperlich, Andreas (author)
- Julius Maximilian Univ Wurzburg, Germany
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- Dyakonov, Vladimir (author)
- Julius Maximilian Univ Wurzburg, Germany
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- Yuan, Jun (author)
- Cent South Univ, Peoples R China
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- Gillett, Alexander J. J. (author)
- Univ Cambridge, England
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(creator_code:org_t)
- WILEY-V C H VERLAG GMBH, 2023
- 2023
- English.
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In: Advanced Energy Materials. - : WILEY-V C H VERLAG GMBH. - 1614-6832 .- 1614-6840. ; 13:36
- Related links:
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https://liu.diva-por... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- Non-fullerene acceptors (NFAs) have enabled power conversion efficiencies exceeding 19% in organic solar cells (OSCs). However, the open-circuit voltage of OSCs remains low relative to their optical gap due to excessive non-radiative recombination, and this now limits performance. Here, an important aspect of OSC design is considered, namely management of the triplet exciton population formed after non-geminate charge recombination. By comparing the blends PM6:Y11 and PM6:Y6, it is shown that the greater crystallinity of the NFA domains in PM6:Y11 leads to a higher rate of triplet-triplet annihilation (TTA). This is attributed to the four times larger ground state dipole moment of Y11 versus Y6, which improves the long range NFA out-of-plane ordering. Since TTA converts a fraction of the non-emissive triplet states into bright singlet states, it has the potential to reduce non-radiative voltage losses. Through a kinetic analysis of the recombination processes under 1-Sun illumination, a framework is provided for determining the conditions under which TTA may improve OSC performance. If these could be satisfied, TTA has the potential to reduce non-radiative voltage losses by up to several tens of millivolts.
Subject headings
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
Keyword
- non-radiative voltage losses; organic solar cells; photoluminescence-detected magnetic resonance; transient absorption; triplet excitons; triplet-triplet annihilation
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Hart, Lucy J. F.
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Gruene, Jeannine
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Liu, Wei
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Lau, Tsz-ki
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Luke, Joel
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Chin, Yi-Chun
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show more...
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Jiang, Xinyu
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Zhang, Huotian
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Sowood, Daniel J ...
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Unson, Darcy M. ...
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Kim, Ji-Seon
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Lu, Xinhui
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Zou, Yingping
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Gao, Feng
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Sperlich, Andrea ...
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Dyakonov, Vladim ...
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Yuan, Jun
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Gillett, Alexand ...
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- 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 Atom and Molecul ...
- Articles in the publication
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Advanced Energy ...
- By the university
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Linköping University