Low-Concentration Pyridine-Derived Molecular Passivation for Efficient Two-Step Assistance-Free Blade-Coated FAPbI3 Solar Cells
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Le résumé fourni par la source
The two-step blade-coating method exhibits several advantages such as simple operation and high reproducibility, making it a promising scalable deposition process for high-efficiency perovskite solar cells. However, a large number of defects exist at the interface, leading to nonradiative carrier recombination losses, which negatively impact device performance and stability. Introducing pyridine derivatives at the interface to passivate defects is an effective strategy. However, most pyridine-derived molecules are used in large quantities and high concentrations, which compromises process reproducibility, reduces manufacturing reliability, and increases production costs. This study demonstrates the introduction of 3,5-Difluorpyridin-2,6-Diamin (2NF-Py) molecules at the perovskite/hole transport layer interface. Through the –NH 2 group and pyridine nitrogen on the 2NF-Py molecule, which interact with interfacial uncoordinated Pb 2+ and free I –, defects are effectively passivated. Meanwhile, the F group on the 2NF-Py pyridine ring increases the electrostatic center shift, thereby improving its reaction activity and enhancing its defect passivation capability. As a result, an efficiency increases from 18.07 to 21.82% was achieved at a low concentration of 0.2 mg/mL, marking the highest efficiency for perovskite solar cells (PSCs) fabricated using a two-step blade-coating process without additional assistance and the device maintained 90% of its initial efficiency after being placed in air for 1536 h.
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Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé, mais le titre doit être comparé manuellement.
- Titre Crossref
- Low-Concentration Pyridine-Derived Molecular Passivation for Efficient Two-Step Assistance-Free Blade-Coated FAPbI<sub>3</sub> Solar Cells
- Date Crossref
- 08/08/2025
- Éditeur
- American Chemical Society (ACS)
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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University of Science and Technology of China pays non établi dans la noticeUniversité ou école supérieure
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Chinese Academy of Sciences pays non établi dans la noticeOrganisme public
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Advanced Materials and Devices (United States) pays non établi dans la noticeEntreprise
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Wuhan Engineering Science & Technology Institute pays non établi dans la noticeStructure de recherche
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Ningbo Institute of Industrial Technology pays non établi dans la noticeStructure de recherche
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Laboratory of Advanced Nano-Optoelectronic Materials and Devices pays non établi dans la noticeStructure de recherche
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Nano Science and Technology Institute pays non établi dans la noticeStructure de recherche
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Ningbo Institute of Materials Technology and Engineering pays non établi dans la noticeStructure de recherche
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Qianwan Institute of CNITECH pays non établi dans la noticeStructure de recherche
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Ltd Zhejiang Aiko Solar Technology Co. pays non établi dans la noticeEntreprise
University of Science and Technology of China, Chinese Academy of Sciences et Advanced Materials and Devices (United States), avec 7 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.