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pi-Extended Nonfull...
pi-Extended Nonfullerene Acceptors for Efficient Organic Solar Cells with a High Open-Circuit Voltage of 0.94 V and a Low Energy Loss of 0.49 eV
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- Pan, Junxiu (author)
- Tianjin Univ, Peoples R China; Chinese Acad Sci, Peoples R China
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- Shi, Yanan (author)
- Chinese Acad Sci, Peoples R China
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- Yu, Jianwei (author)
- Linköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten
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- Zhang, Hao (author)
- Chinese Acad Sci, Peoples R China
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- Liu, Yanan (author)
- Tianjin Univ, Peoples R China; Chinese Acad Sci, Peoples R China
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- Zhang, Jianqi (author)
- Chinese Acad Sci, Peoples R China
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- Gao, Feng (author)
- Linköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten
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- Yu, Xi (author)
- Tianjin Univ, Peoples R China
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- Lu, Kun (author)
- Chinese Acad Sci, Peoples R China
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- Wei, Zhixiang (author)
- Chinese Acad Sci, Peoples R China
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(creator_code:org_t)
- 2021-05-06
- 2021
- English.
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In: ACS Applied Materials and Interfaces. - : AMER CHEMICAL SOC. - 1944-8244 .- 1944-8252. ; 13:19, s. 22531-22539
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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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- A combination of high open-circuit voltage (V-oc) and short-circuit current density (J(sc)) typically creates effective organic solar cells (OSCs). Y5, a member of the Y-series acceptors, can achieve high V-oc of 0.94 V with PM6 but low J(sc) of 12.8 mA cm(-2). To maintain the high V-oc while increasing the J(sc) of devices, we developed a new nonfullerene acceptor, namely, BTP-C2C4-N, by extending the conjugation of a Y5 molecule with a naphthalenebased end acceptor. In comparison with Y5-based devices, PM6:BTP-C2C4-N-based devices exhibited significantly higher J(sc) of 18.2 mA cm(-2) followed by a high V-oc. To further increase the photovoltaic properties of BTP-C2C4-N analogues, BTP-C4C6-N and BTP-C6C8-N molecules with better processability and film morphology are obtained by adjusting the alkyl branched chain length. The optimized OSCs based on BTP-C4C6-N with a moderate alkyl branched chain length exhibited the best PCE of 12.4% with a high V-oc of 0.94 V and J(sc) of 20.7 mA cm(-2). Notably, the devices achieved a low energy loss of 0.49 eV (0.51 eV for Y5 system) accompanied by a small nonradiative energy loss. The results indicate that nonfullerene acceptors with extended terminal motifs and optimized branched chain lengths can effectively enhance the performance of OSCs and reduce energy loss.
Subject headings
- NATURVETENSKAP -- Fysik -- Annan fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Other Physics Topics (hsv//eng)
Keyword
- organic solar cell; nonfullerene acceptor; energy loss; high voltage; side-chain engineering
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Pan, Junxiu
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Shi, Yanan
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Yu, Jianwei
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Zhang, Hao
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Liu, Yanan
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Zhang, Jianqi
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show more...
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Gao, Feng
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Yu, Xi
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Lu, Kun
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Wei, Zhixiang
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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 Other Physics To ...
- Articles in the publication
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ACS Applied Mate ...
- By the university
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Linköping University