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Near-infrared absor...
Near-infrared absorbing acceptor with suppressed triplet exciton generation enabling high performance tandem organic solar cells
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- Jia, Zhenrong (författare)
- Chinese Acad Sci, Peoples R China
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- Ma, Qing (författare)
- Chinese Acad Sci, Peoples R China
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- Chen, Zeng (författare)
- Zhejiang Univ, Peoples R China
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- Meng, Lei (författare)
- Chinese Acad Sci, Peoples R China
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- Jain, Nakul (författare)
- Linköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten
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- Angunawela, Indunil (författare)
- North Carolina State Univ, NC 27695 USA
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- Qin, Shucheng (författare)
- Chinese Acad Sci, Peoples R China
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- Kong, Xiaolei (författare)
- Chinese Acad Sci, Peoples R China; Univ Chinese Acad Sci, Peoples R China
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- Li, Xiaojun (författare)
- Chinese Acad Sci, Peoples R China; Univ Chinese Acad Sci, Peoples R China
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- Yang, Yang (Michael) (författare)
- Zhejiang Univ, Peoples R China
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- Zhu, Haiming (författare)
- Zhejiang Univ, Peoples R China
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- Ade, Harald (författare)
- North Carolina State Univ, NC 27695 USA
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- Gao, Feng (författare)
- Linköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten
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- Li, Yongfang (författare)
- Chinese Acad Sci, Peoples R China; Univ Chinese Acad Sci, Peoples R China; Soochow Univ, Peoples R China
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(creator_code:org_t)
- 2023-03-04
- 2023
- Engelska.
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Ingår i: Nature Communications. - : NATURE PORTFOLIO. - 2041-1723. ; 14:1
- Relaterad länk:
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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
Ämnesord
Stäng
- Reducing the energy loss of sub-cells is critical for high performance tandem organic solar cells, while it is limited by the severe non-radiative voltage loss via the formation of non-emissive triplet excitons. Herein, we develop an ultra-narrow bandgap acceptor BTPSeV-4F through replacement of terminal thiophene by selenophene in the central fused ring of BTPSV-4F, for constructing efficient tandem organic solar cells. The selenophene substitution further decrease the optical bandgap of BTPSV-4F to 1.17 eV and suppress the formation of triplet exciton in the BTPSV-4F-based devices. The organic solar cells with BTPSeV-4F as acceptor demonstrate a higher power conversion efficiency of 14.2% with a record high short-circuit current density of 30.1 mA cm(-2) and low energy loss of 0.55 eV benefitted from the low non-radiative energy loss due to the suppression of triplet exciton formation. We also develop a high-performance medium bandgap acceptor O1-Br for front cells. By integrating the PM6:O1-Br based front cells with the PTB7-Th:BTPSeV-4F based rear cells, the tandem organic solar cell demonstrates a power conversion efficiency of 19%. The results indicate that the suppression of triplet excitons formation in the near-infrared-absorbing acceptor by molecular design is an effective way to improve the photovoltaic performance of the tandem organic solar cells. Reducing energy loss of sub-cells is critical for high performance tandem organic solar cells. Here, the authors design and synthesize an ultra-narrow bandgap acceptor through replacement of terminal thiophene by selenophene in the central fused ring, achieving efficiency of 19% for tandem cells.
Ämnesord
- NATURVETENSKAP -- Fysik -- Annan fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Other Physics Topics (hsv//eng)
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Jia, Zhenrong
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Ma, Qing
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Chen, Zeng
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Meng, Lei
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Jain, Nakul
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Angunawela, Indu ...
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visa fler...
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Qin, Shucheng
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Kong, Xiaolei
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Li, Xiaojun
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Yang, Yang (Mich ...
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Zhu, Haiming
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Ade, Harald
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Gao, Feng
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Li, Yongfang
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- NATURVETENSKAP
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NATURVETENSKAP
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