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|a 10.1002/adma.202211871
|2 doi
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|a pubmed24n1174.xml
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|a eng
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|a Pang, Bo
|e verfasserin
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|a BN-Bond-Embedded Triplet Terpolymers with Small Singlet-Triplet Energy Gaps for Suppressing Non-Radiative Recombination and Improving Blend Morphology in Organic Solar Cells
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|c 2023
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|a Text
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|a ƒaComputermedien
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|a ƒa Online-Ressource
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|a Date Completed 16.05.2023
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|a Date Revised 16.05.2023
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2023 Wiley-VCH GmbH.
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|a Suppressing the photon energy loss (Eloss ), especially the non-radiative loss, is of importance to further improve the device performance of organic solar cells (OSCs). However, typical π-conjugated semiconductors possess a large singlet-triplet energy gap (ΔEST ), leading to a lower triplet state than charge transfer state and contributing to a non-radiative loss channel of the photocurrent by the triplet state. Herein, a series of triplet polymer donors are developed by introducing a BNIDT block into the PM6 polymer backbone. The high electron affinity of BNIDT and the opposite resonance effect of the BN bond in BNIDT results in a lowered highest occupied molecular orbital (HOMO) and a largely reduced ΔEST . Moreover, the morphology of the active blends is also optimized by fine-tuning the BNIDT content. Therefore, non-radiative recombination via the terminal triplet loss channels and morphology traps is effectively suppressed. The PNB-3 (with 3% BNIDT):L8-BO device exhibits both small ΔEST and optimized morphology, favoring more efficient charge transfer and transport. Finally, the simultaneously enhanced Voc of 0.907 V, Jsc of 26.59 mA cm-2 , and FF of 78.86% contribute to a champion PCE of 19.02%. Therefore, introducing BN bonds into benchmark polymers is a possible avenue toward higher-performance of OSCs
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|a Journal Article
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|a BN bonds
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|a non-radiative recombination
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|a organic solar cells
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|a singlet-triplet energy gap
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|a triplet terpolymers
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|a Liao, Chentong
|e verfasserin
|4 aut
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|a Xu, Xiaopeng
|e verfasserin
|4 aut
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|a Peng, Shaoqian
|e verfasserin
|4 aut
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|a Xia, Jianlong
|e verfasserin
|4 aut
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|a Guo, Yuanyuan
|e verfasserin
|4 aut
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|a Xie, Yuan
|e verfasserin
|4 aut
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|a Chen, Yuting
|e verfasserin
|4 aut
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|a Duan, Chunhui
|e verfasserin
|4 aut
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|a Wu, Hongbin
|e verfasserin
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|a Li, Ruipeng
|e verfasserin
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|a Peng, Qiang
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Advanced materials (Deerfield Beach, Fla.)
|d 1998
|g 35(2023), 17 vom: 02. Apr., Seite e2211871
|w (DE-627)NLM098206397
|x 1521-4095
|7 nnns
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|g volume:35
|g year:2023
|g number:17
|g day:02
|g month:04
|g pages:e2211871
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|u http://dx.doi.org/10.1002/adma.202211871
|3 Volltext
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