Tailoring pyridine bridged chalcogen-concave molecules for defects passivation enables efficient and stable perovskite solar cells
Abstract Suppressing deep-level defects at the perovskite bulk and surface is indispensable for reducing the non-radiative recombination losses and improving efficiency and stability of perovskite solar cells (PSCs). In this study, two Lewis bases based on chalcogen-thiophene (n-Bu4S) and selenophen...
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Nature Portfolio
2025-01-01
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| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-025-55815-z |
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| author | Muhammad Azam Yao Ma Boxue Zhang Xiangfeng Shao Zhongquan Wan Huaibiao Zeng Haomiao Yin Junsheng Luo Chunyang Jia |
| author_facet | Muhammad Azam Yao Ma Boxue Zhang Xiangfeng Shao Zhongquan Wan Huaibiao Zeng Haomiao Yin Junsheng Luo Chunyang Jia |
| author_sort | Muhammad Azam |
| collection | DOAJ |
| description | Abstract Suppressing deep-level defects at the perovskite bulk and surface is indispensable for reducing the non-radiative recombination losses and improving efficiency and stability of perovskite solar cells (PSCs). In this study, two Lewis bases based on chalcogen-thiophene (n-Bu4S) and selenophene (n-Bu4Se) having tetra-pyridine as bridge are developed to passivate defects in perovskite film. The uncoordinated Pb2+ and iodine vacancy defects can interact with chalcogen-concave group and pyridine group through the formation of the Lewis acid-base adduct, particularly both the defects can be surrounded by concave molecules, resulting in effective suppression charge recombination. This approach enables a power conversion efficiency (PCE) as high as 25.37% (25.18% certified) for n-i-p PSCs with stable operation at 65 °C and 1-sun illumination for 1300 hours in N2 (ISOS-L-2 protocol), retaining 94% of the initial efficiency. Our work provides insight into the bowl-shaped Lewis base in defects passivation by coordinated strategy for high-performance photovoltaic devices. |
| format | Article |
| id | doaj-art-64ae719e7d7d4af9b516074bcede1e19 |
| institution | Kabale University |
| issn | 2041-1723 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Nature Communications |
| spelling | doaj-art-64ae719e7d7d4af9b516074bcede1e192025-01-12T12:29:40ZengNature PortfolioNature Communications2041-17232025-01-0116111110.1038/s41467-025-55815-zTailoring pyridine bridged chalcogen-concave molecules for defects passivation enables efficient and stable perovskite solar cellsMuhammad Azam0Yao Ma1Boxue Zhang2Xiangfeng Shao3Zhongquan Wan4Huaibiao Zeng5Haomiao Yin6Junsheng Luo7Chunyang Jia8National Key Laboratory of Electronic Films and Integrated Devices, School of Integrated Circuit Science and Engineering, University of Electronic Science and Technology of ChinaState Key Laboratory of Applied Organic Chemistry, Lanzhou UniversityInstitut de Recherche de Chimie Paris (IRCP) UMR8247, Chimie ParisTech, PSL University CNRSState Key Laboratory of Applied Organic Chemistry, Lanzhou UniversityNational Key Laboratory of Electronic Films and Integrated Devices, School of Integrated Circuit Science and Engineering, University of Electronic Science and Technology of ChinaNational Key Laboratory of Electronic Films and Integrated Devices, School of Integrated Circuit Science and Engineering, University of Electronic Science and Technology of ChinaNational Key Laboratory of Electronic Films and Integrated Devices, School of Integrated Circuit Science and Engineering, University of Electronic Science and Technology of ChinaNational Key Laboratory of Electronic Films and Integrated Devices, School of Integrated Circuit Science and Engineering, University of Electronic Science and Technology of ChinaNational Key Laboratory of Electronic Films and Integrated Devices, School of Integrated Circuit Science and Engineering, University of Electronic Science and Technology of ChinaAbstract Suppressing deep-level defects at the perovskite bulk and surface is indispensable for reducing the non-radiative recombination losses and improving efficiency and stability of perovskite solar cells (PSCs). In this study, two Lewis bases based on chalcogen-thiophene (n-Bu4S) and selenophene (n-Bu4Se) having tetra-pyridine as bridge are developed to passivate defects in perovskite film. The uncoordinated Pb2+ and iodine vacancy defects can interact with chalcogen-concave group and pyridine group through the formation of the Lewis acid-base adduct, particularly both the defects can be surrounded by concave molecules, resulting in effective suppression charge recombination. This approach enables a power conversion efficiency (PCE) as high as 25.37% (25.18% certified) for n-i-p PSCs with stable operation at 65 °C and 1-sun illumination for 1300 hours in N2 (ISOS-L-2 protocol), retaining 94% of the initial efficiency. Our work provides insight into the bowl-shaped Lewis base in defects passivation by coordinated strategy for high-performance photovoltaic devices.https://doi.org/10.1038/s41467-025-55815-z |
| spellingShingle | Muhammad Azam Yao Ma Boxue Zhang Xiangfeng Shao Zhongquan Wan Huaibiao Zeng Haomiao Yin Junsheng Luo Chunyang Jia Tailoring pyridine bridged chalcogen-concave molecules for defects passivation enables efficient and stable perovskite solar cells Nature Communications |
| title | Tailoring pyridine bridged chalcogen-concave molecules for defects passivation enables efficient and stable perovskite solar cells |
| title_full | Tailoring pyridine bridged chalcogen-concave molecules for defects passivation enables efficient and stable perovskite solar cells |
| title_fullStr | Tailoring pyridine bridged chalcogen-concave molecules for defects passivation enables efficient and stable perovskite solar cells |
| title_full_unstemmed | Tailoring pyridine bridged chalcogen-concave molecules for defects passivation enables efficient and stable perovskite solar cells |
| title_short | Tailoring pyridine bridged chalcogen-concave molecules for defects passivation enables efficient and stable perovskite solar cells |
| title_sort | tailoring pyridine bridged chalcogen concave molecules for defects passivation enables efficient and stable perovskite solar cells |
| url | https://doi.org/10.1038/s41467-025-55815-z |
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