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231226s2022 xx |||||o 00| ||eng c |
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|a 10.1002/adma.202206717
|2 doi
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|a pubmed25n1156.xml
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|a (DE-627)NLM347053521
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|a (NLM)36189867
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|a DE-627
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|e rakwb
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|a eng
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|a Wang, Yifan
|e verfasserin
|4 aut
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|a Quasi-Homojunction Organic Nonfullerene Photovoltaics Featuring Fundamentals Distinct from Bulk Heterojunctions
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|c 2022
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Completed 19.12.2022
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|a Date Revised 22.12.2022
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2022 Wiley-VCH GmbH.
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|a In contrast to classical bulk heterojunction (BHJ) in organic solar cells (OSCs), the quasi-homojunction (QHJ) with extremely low donor content (≤10 wt.%) is unusual and generally yields much lower device efficiency. Here, representative polymer donors and nonfullerene acceptors are selected to fabricate QHJ OSCs, and a complete picture for the operation mechanisms of high-efficiency QHJ devices is illustrated. PTB7-Th:Y6 QHJ devices at donor:acceptor (D:A) ratios of 1:8 or 1:20 can achieve 95% or 64% of the efficiency obtained from its BHJ counterpart at the optimal D:A ratio of 1:1.2, respectively, whereas QHJ devices with other donors or acceptors suffer from rapid roll-off of efficiency when the donors are diluted. Through device physics and photophysics analyses, it is observed that a large portion of free charges can be intrinsically generated in the neat Y6 domains rather than at the D/A interface. Y6 also serves as an ambipolar transport channel, so that hole transport as also mainly through Y6 phase. The key role of PTB7-Th is primarily to reduce charge recombination, likely assisted by enhancing quadrupolar fields within Y6 itself, rather than the previously thought principal roles of light absorption, exciton splitting, and hole transport
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|a Journal Article
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|a fused-ring electron acceptor
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|a nonfullerene
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|a organic solar cell
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|a quasi-homojunction
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|a Price, Michael B
|e verfasserin
|4 aut
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|a Bobba, Raja Sekhar
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Lu, Heng
|e verfasserin
|4 aut
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|a Xue, Jingwei
|e verfasserin
|4 aut
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|a Wang, Yilin
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Li, Mengyang
|e verfasserin
|4 aut
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1 |
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|a Ilina, Aleksandra
|e verfasserin
|4 aut
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|a Hume, Paul A
|e verfasserin
|4 aut
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|a Jia, Boyu
|e verfasserin
|4 aut
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|a Li, Tengfei
|e verfasserin
|4 aut
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|a Zhang, Yuchen
|e verfasserin
|4 aut
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|a Davis, Nathaniel J L K
|e verfasserin
|4 aut
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|a Tang, Zheng
|e verfasserin
|4 aut
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|a Ma, Wei
|e verfasserin
|4 aut
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|a Qiao, Quinn
|e verfasserin
|4 aut
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|a Hodgkiss, Justin M
|e verfasserin
|4 aut
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|a Zhan, Xiaowei
|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 34(2022), 50 vom: 25. Dez., Seite e2206717
|w (DE-627)NLM098206397
|x 1521-4095
|7 nnas
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| 773 |
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|g volume:34
|g year:2022
|g number:50
|g day:25
|g month:12
|g pages:e2206717
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|u http://dx.doi.org/10.1002/adma.202206717
|3 Volltext
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