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High-Performance Al...
High-Performance All-Small-Molecule Organic Solar Cells Enabled by Regio-Isomerization of Noncovalently Conformational Locks
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- Zhang, Xin (author)
- Univ Chinese Acad Sci, Peoples R China
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- Qin, Linqing (author)
- Univ Chinese Acad Sci, Peoples R China
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- Li, Yuhao (author)
- Chinese Univ Hong Kong, Peoples R China
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- Yu, Jianwei, 1992- (author)
- Linköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten
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- Chen, Hao (author)
- Univ Chinese Acad Sci, Peoples R China
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- Gu, Xiaobin (author)
- Univ Chinese Acad Sci, Peoples R China
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- Wei, Yanan (author)
- Univ Chinese Acad Sci, Peoples R China
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- Lu, Xinhui (author)
- Chinese Univ Hong Kong, Peoples R China
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- Gao, Feng, 1981- (author)
- Linköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten
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- Huang, Hui (author)
- Univ Chinese Acad Sci, Peoples R China
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(creator_code:org_t)
- 2022-02-04
- 2022
- English.
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In: Advanced Functional Materials. - : WILEY-V C H VERLAG GMBH. - 1616-301X .- 1616-3028. ; 32:19
- 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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- The power conversion efficiencies (PCEs) of organic solar cells (OSCs) have surpassed 19% thanks to the innovation of polymer donors and molecular acceptors. However, the batch-to-batch variations in polymer materials are detrimental to the reproducibility of the device performance. In comparison, small-molecule donors (SMDs) possess some unique advantages, such as well-defined molecular weights, easy purification, and excellent batch-to-batch repeatability. Herein, a pair of regioisomeric SMDs (BT-O1 and BT-O2) has been synthesized with alkoxy groups as S center dot center dot center dot O noncovalently conformational locks (NoCLs) at the inner and outer position, respectively. Theoretical and experimental results reveal that the regioisomeric effect has a significant influence on the light-harvest ability, energy levels, molecular geometries, internal reorganization energy, and packing behaviors for the two SMDs. As a result, BT-O2-based binary device shows an impressive PCE of 13.99%, much higher than that of BT-O1 based one (4.07%), due to the better-aligned energy level, more balanced charge transport, less charge recombination, lower energy loss, and more favorable phase separation. Furthermore, the fullerene derivative PC71BM is introduced into BT-O2:H3 as the third component to achieve a notable PCE of 15.34% (certified 14.6%). Overall, this work reveals that NoCLs is a promising strategy to achieve high-performance SMDs for all-small-molecule OSCs.
Subject headings
- NATURVETENSKAP -- Kemi -- Fysikalisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Physical Chemistry (hsv//eng)
Keyword
- all-small-molecule organic solar cells; noncovalently conformational locks; regio-isomerization; small-molecule donors
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Zhang, Xin
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Qin, Linqing
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Li, Yuhao
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Yu, Jianwei, 199 ...
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Chen, Hao
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Gu, Xiaobin
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show more...
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Wei, Yanan
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Lu, Xinhui
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Gao, Feng, 1981-
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Huang, Hui
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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 Chemical Science ...
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and Physical Chemist ...
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Advanced Functio ...
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Linköping University