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Mechanism study on ...
Mechanism study on organic ternary photovoltaics with 18.3% certified efficiency: from molecule to device
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- Li, Yaokai (author)
- Zhejiang Univ, Peoples R China
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- Guo, Yuan (author)
- Qilu Univ Technol, Peoples R China
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- Chen, Zeng (author)
- Zhejiang Univ, Peoples R China
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- Zhan, Lingling (author)
- Zhejiang Univ, Peoples R China
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- He, Chengliang (author)
- Zhejiang Univ, Peoples R China
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- Bi, Zhaozhao (author)
- Xi An Jiao Tong Univ, Peoples R China
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- Yao, Nannan, 1992- (author)
- Linköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten
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- Li, Shuixing (author)
- Zhejiang Univ, Peoples R China
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- Zhou, Guanqing (author)
- Zhejiang Univ, Peoples R China
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- Yi, Yuanping (author)
- Chinese Acad Sci, Peoples R China
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- Yang, Yang (Michael) (author)
- Zhejiang Univ, Peoples R China
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- Zhu, Haiming (author)
- Zhejiang Univ, Peoples R China
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- Ma, Wei (author)
- Xi An Jiao Tong Univ, Peoples R China
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- Gao, Feng, 1981- (author)
- Linköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten
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- Zhang, Fengling (author)
- Linköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten
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- Zuo, Lijian (author)
- Zhejiang Univ, Peoples R China; Zhejiang Univ Hangzhou Global Sci & Technol Innov, Peoples R China
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- Chen, Hongzheng (author)
- Zhejiang Univ, Peoples R China
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(creator_code:org_t)
- 2022
- 2022
- English.
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In: Energy & Environmental Science. - : ROYAL SOC CHEMISTRY. - 1754-5692 .- 1754-5706. ; 15:2, s. 855-865
- 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
Subject headings
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- Multi-component organic photovoltaics (OPVs), e.g., ternary blends, are effective for high performance, while the fundamental understanding from the molecular to device level is lacking. To address this issue, we here systematically study the working mechanism of ternary OPVs based on non-fullerene acceptors (NFAs). With both molecular dynamics simulations and morphology characterization, we identify that when adding another larger band gap and highly miscible NFA, namely IT-4F or BTP-S2, into the PBDB-TF:BTP-eC9 blend, the NFAs undergo molecular intermixing selectively with BTP-eC9. This causes the composition-dependent band gap and charge recombination, and hence the composition-dependent V-OC. While the charge recombination still dominantly occurs at the PBDB-TF:BTP-eC9 interface, BTP-S2 or IT-4F plays an auxiliary role in facilitating charge transfer and suppressing non-radiative decay. Interestingly, intermolecular end-group packing in the intermixed blend is improved compared to that in pristine films, leading to higher carrier mobility. These synergistic effects significantly improve the power conversion efficiency of the device to an outstanding value of 18.7% (certified value of 18.3%).
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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Li, Yaokai
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Guo, Yuan
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Chen, Zeng
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Zhan, Lingling
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He, Chengliang
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Bi, Zhaozhao
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show more...
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Yao, Nannan, 199 ...
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Li, Shuixing
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Zhou, Guanqing
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Yi, Yuanping
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Yang, Yang (Mich ...
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Zhu, Haiming
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Ma, Wei
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Gao, Feng, 1981-
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Zhang, Fengling
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Zuo, Lijian
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Chen, Hongzheng
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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 Condensed Matter ...
- Articles in the publication
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Energy & Environ ...
- By the university
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Linköping University