- Interfacial layers in conjunction with suitable charge-transport layers can significantly improve the performance of optoelectronic devices by facilitating efficient charge carrier injection and extraction.
This work uses a neat C-60 interlayer on the anode to experimentally reveal that surface recombination is a significant contributor to nonradiative recombination losses in organic solar cells.
These losses are shown to proportionally increase with the extent of contact between donor molecules in the photoactive layer and a molybdenum oxide (MoO3) hole extraction layer, proven by calculating voltage losses in low- and high-donor-content bulk heterojunction device architectures.
Using a novel in-device determination of the built-in voltage, the suppression of surface recombination, due to the insertion of a thin anodic-C-60 interlayer on MoO3, is attributed to an enhanced built-in potential.
The increased built-in voltage reduces the presence of minority charge carriers at the electrodes-a new perspective on the principle ofInterfacial layers in conjunction with suitable charge-transport layers can significantly improve the performance of optoelectronic devices by facilitating efficient charge carrier injection and extraction.
This work uses a neat C-60 interlayer on the anode to experimentally reveal that surface recombination is a significant contributor to nonradiative recombination losses in organic solar cells.
These losses are shown to proportionally increase with the extent of contact between donor molecules in the photoactive layer and a molybdenum oxide (MoO3) hole extraction layer, proven by calculating voltage losses in low- and high-donor-content bulk heterojunction device architectures.
Using a novel in-device determination of the built-in voltage, the suppression of surface recombination, due to the insertion of a thin anodic-C-60 interlayer on MoO3, is attributed to an enhanced built-in potential.
The increased built-in voltage reduces the presence of minority charge carriers at the electrodes-a new perspective on the principle of selective charge extraction layers.
The benefit to device efficiency is limited by a critical interlayer thickness, which depends on the donor material in bilayer devices.
Given the high popularity of MoO3 as an efficient hole extraction and injection layer and the increasingly popular discussion on interfacial phenomena in organic optoelectronic devices, these findings are relevant to and address different branches of organic electronics, providing insights for future device design.…
MetadatenAuthor details: | Manasi PranavORCiD, Johannes BenduhnORCiD, Mathias NymanORCiD, Seyed Mehrdad HosseiniORCiDGND, Jonas KublitskiORCiD, Safa ShoaeeORCiDGND, Dieter NeherORCiDGND, Karl LeoORCiDGND, Donato SpoltoreORCiD |
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DOI: | https://doi.org/10.1021/acsami.1c00049 |
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ISSN: | 1944-8244 |
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ISSN: | 1944-8252 |
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Pubmed ID: | https://pubmed.ncbi.nlm.nih.gov/33660501 |
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Title of parent work (English): | ACS applied materials & interfaces |
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Publisher: | American Chemical Society |
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Place of publishing: | Washington |
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Publication type: | Article |
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Language: | English |
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Date of first publication: | 2021/03/04 |
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Publication year: | 2021 |
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Release date: | 2024/04/11 |
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Tag: | charge selectivity; interfacial layers; molybdenum oxide; nonradiative losses; organic solar cells |
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Volume: | 13 |
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Issue: | 10 |
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Number of pages: | 7 |
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First page: | 12603 |
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Last Page: | 12609 |
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Funding institution: | Sachsische Aufbaubank [100325708]; Academy of FinlandAcademy of Finland [326000]; Deutsche Akademische Austausch DienstDeutscher Akademischer Austausch Dienst (DAAD) |
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Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie |
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DDC classification: | 5 Naturwissenschaften und Mathematik / 54 Chemie / 540 Chemie und zugeordnete Wissenschaften |
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| 6 Technik, Medizin, angewandte Wissenschaften / 60 Technik / 600 Technik, Technologie |
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Peer review: | Referiert |
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External remark: | Reply to Comment on:https://pubs.acs.org/doi/epdf/10.1021/acsami.1c15450?ref=article_openPDF |
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