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Near infrared elect...
Near infrared electron acceptors with a photoresponse beyond 1000 nm for highly efficient organic solar cells
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- He, Chengliang (author)
- Zhejiang Univ, Peoples R China
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- Li, Yaokai (author)
- Zhejiang Univ, Peoples R China
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- Liu, Yanfeng (author)
- Linköpings universitet,Biomolekylär och Organisk Elektronik,Tekniska fakulteten
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- Li, Yuhao (author)
- Chinese Univ Hong Kong, Peoples R China
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- Zhou, Guanqing (author)
- Shanghai Jiao Tong Univ, Peoples R China
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- Li, Shuixing (author)
- Zhejiang Univ, Peoples R China
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- Zhu, Haiming (author)
- Zhejiang Univ, Peoples R China
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- Lu, Xinhui (author)
- Chinese Univ Hong Kong, Peoples R China
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- Zhang, Fengling (author)
- Linköpings universitet,Biomolekylär och Organisk Elektronik,Tekniska fakulteten
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- Li, Chang-Zhi (author)
- Zhejiang Univ, Peoples R China
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- Chen, Hongzheng (author)
- Zhejiang Univ, Peoples R China
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(creator_code:org_t)
- 2020
- 2020
- English.
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In: Journal of Materials Chemistry A. - : ROYAL SOC CHEMISTRY. - 2050-7488 .- 2050-7496. ; 8:35, s. 18154-18161
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Abstract
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- Developing near infrared (NIR) organic semiconductors is indispensable for promoting the performance of organic solar cells (OSCs), but addressing the trade-off between voltage and current density thus achieving high efficiency with low energy loss is still an urgent challenge. Herein, NIR acceptors (H1, H2 and H3) with a photoresponse beyond 1000 nm were developed by conjugating dithienopyrrolobenzothiadiazole to 2-(5,6-difluoro-3-oxo-2,3-dihydro-1H-inden-1-ylidene)malononitrileviavaried alkyl thiophene bridges. It was found that the linear outward chains in thiophene bridges could mitigate both the conformation disorder of H3 and the electronic disorder of the PBDB-T:H3 blends, which could help to form a favorable blend morphology, facilitating highly efficient photoelectric conversion in the resultant OSCs. As a result, devices based on PBDB-T:H3 achieve a high efficiency of 13.75% with a low energy loss of 0.55 eV, which is one of the highest efficiencies and the lowest energy loss among OSCs with an optoelectronic response near 1000 nm. This work provides a new design strategy towards NIR acceptors for efficient OSCs and future exploration of functional optoelectronics.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Naturresursteknik -- Energisystem (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Environmental Engineering -- Energy Systems (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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He, Chengliang
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Li, Yaokai
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Liu, Yanfeng
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Li, Yuhao
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Zhou, Guanqing
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Li, Shuixing
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show more...
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Zhu, Haiming
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Lu, Xinhui
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Zhang, Fengling
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Li, Chang-Zhi
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Chen, Hongzheng
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show less...
- About the subject
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- ENGINEERING AND TECHNOLOGY
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ENGINEERING AND ...
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and Environmental En ...
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and Energy Systems
- Articles in the publication
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Journal of Mater ...
- By the university
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Linköping University