Self-cleaning Spiro-OMeTAD via multimetal doping for perovskite photovoltaics
Abstract Record power conversion efficiencies (PCEs) of perovskite solar cells (PSCs) are usually achieved using organic spiro-OMeTAD. However, conventional doping with hygroscopic dopants (LiTFSI and tBP) leads to compromised device stability. We introduce a synergistic mixed doping strategy that u...
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Nature Portfolio
2025-05-01
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| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-025-59350-9 |
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| author | Sisi Wang Shaochen Zhang Xiaohuo Shi Canglang Yao Donger Jin Danyu Gu Yinjuan Chen Jiazhe Xu Jingjing Xue Rui Wang |
| author_facet | Sisi Wang Shaochen Zhang Xiaohuo Shi Canglang Yao Donger Jin Danyu Gu Yinjuan Chen Jiazhe Xu Jingjing Xue Rui Wang |
| author_sort | Sisi Wang |
| collection | DOAJ |
| description | Abstract Record power conversion efficiencies (PCEs) of perovskite solar cells (PSCs) are usually achieved using organic spiro-OMeTAD. However, conventional doping with hygroscopic dopants (LiTFSI and tBP) leads to compromised device stability. We introduce a synergistic mixed doping strategy that utilizes a combination of metal-TFSI dopants—LiTFSI, KTFSI, NaTFSI, Ca(TFSI)2, and Mg(TFSI)2—to enhance doping efficiency while effectively removing hygroscopic contaminants from the Spiro-OMeTAD solution. This approach achieves PCEs exceeding 25% and significantly improves stability under harsh environmental conditions. Notably, Ca(TFSI)2 and Mg(TFSI)2 facilitate enhanced oxidative doping, while NaTFSI promotes interstitial doping in the bulk perovskite. Additionally, KTFSI serves as a catalytic agent, lowering the reaction energy barrier for the other dopants, thereby accelerating spiro-OMeTAD ion radical production. These findings underscore the potential of synergistic doping in optimizing the performance and longevity of photovoltaic devices. |
| format | Article |
| id | doaj-art-ec080aa792fe4a038a039b3ff33c42ae |
| institution | OA Journals |
| issn | 2041-1723 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Nature Communications |
| spelling | doaj-art-ec080aa792fe4a038a039b3ff33c42ae2025-08-20T02:15:12ZengNature PortfolioNature Communications2041-17232025-05-0116111010.1038/s41467-025-59350-9Self-cleaning Spiro-OMeTAD via multimetal doping for perovskite photovoltaicsSisi Wang0Shaochen Zhang1Xiaohuo Shi2Canglang Yao3Donger Jin4Danyu Gu5Yinjuan Chen6Jiazhe Xu7Jingjing Xue8Rui Wang9Department of Materials Science and Engineering, School of Engineering, Westlake UniversityDepartment of Materials Science and Engineering, School of Engineering, Westlake UniversityKey Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, School of Science, Instrumentation and Service Center for Molecular Sciences, Westlake UniversityLaboratory of Advanced Materials, Fudan UniversityState Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang UniversityKey Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, School of Science, Instrumentation and Service Center for Molecular Sciences, Westlake UniversityKey Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, School of Science, Instrumentation and Service Center for Molecular Sciences, Westlake UniversityDepartment of Materials Science and Engineering, School of Engineering, Westlake UniversityState Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang UniversityDepartment of Materials Science and Engineering, School of Engineering, Westlake UniversityAbstract Record power conversion efficiencies (PCEs) of perovskite solar cells (PSCs) are usually achieved using organic spiro-OMeTAD. However, conventional doping with hygroscopic dopants (LiTFSI and tBP) leads to compromised device stability. We introduce a synergistic mixed doping strategy that utilizes a combination of metal-TFSI dopants—LiTFSI, KTFSI, NaTFSI, Ca(TFSI)2, and Mg(TFSI)2—to enhance doping efficiency while effectively removing hygroscopic contaminants from the Spiro-OMeTAD solution. This approach achieves PCEs exceeding 25% and significantly improves stability under harsh environmental conditions. Notably, Ca(TFSI)2 and Mg(TFSI)2 facilitate enhanced oxidative doping, while NaTFSI promotes interstitial doping in the bulk perovskite. Additionally, KTFSI serves as a catalytic agent, lowering the reaction energy barrier for the other dopants, thereby accelerating spiro-OMeTAD ion radical production. These findings underscore the potential of synergistic doping in optimizing the performance and longevity of photovoltaic devices.https://doi.org/10.1038/s41467-025-59350-9 |
| spellingShingle | Sisi Wang Shaochen Zhang Xiaohuo Shi Canglang Yao Donger Jin Danyu Gu Yinjuan Chen Jiazhe Xu Jingjing Xue Rui Wang Self-cleaning Spiro-OMeTAD via multimetal doping for perovskite photovoltaics Nature Communications |
| title | Self-cleaning Spiro-OMeTAD via multimetal doping for perovskite photovoltaics |
| title_full | Self-cleaning Spiro-OMeTAD via multimetal doping for perovskite photovoltaics |
| title_fullStr | Self-cleaning Spiro-OMeTAD via multimetal doping for perovskite photovoltaics |
| title_full_unstemmed | Self-cleaning Spiro-OMeTAD via multimetal doping for perovskite photovoltaics |
| title_short | Self-cleaning Spiro-OMeTAD via multimetal doping for perovskite photovoltaics |
| title_sort | self cleaning spiro ometad via multimetal doping for perovskite photovoltaics |
| url | https://doi.org/10.1038/s41467-025-59350-9 |
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