Understanding ion migration suppression in all-inorganic mixed halide perovskites via tin-lead alloying
All-inorganic perovskites are advantageous in terms of improved thermal stability compared to organic-inorganic counterparts. However, the ion migration-induced hysteresis significantly undermines the long-term operational stability of all-inorganic perovskite solar cells (PSCs), particularly in mix...
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| Language: | English |
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Tsinghua University Press
2025-06-01
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| Series: | Nano Research Energy |
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| Online Access: | https://www.sciopen.com/article/10.26599/NRE.2025.9120166 |
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| author | Xinyu Li Yanbo Shang Xue Wang Zhimin Fang Tianao Hou Dehan Li Shuang Gao Tao Chen Xu Pan Zhengguo Xiao Shangfeng Yang |
| author_facet | Xinyu Li Yanbo Shang Xue Wang Zhimin Fang Tianao Hou Dehan Li Shuang Gao Tao Chen Xu Pan Zhengguo Xiao Shangfeng Yang |
| author_sort | Xinyu Li |
| collection | DOAJ |
| description | All-inorganic perovskites are advantageous in terms of improved thermal stability compared to organic-inorganic counterparts. However, the ion migration-induced hysteresis significantly undermines the long-term operational stability of all-inorganic perovskite solar cells (PSCs), particularly in mixed halide perovskites. Herein, we report that tin-lead (Sn-Pb) alloying for all-inorganic mixed halide perovskites can effectively inhibit the ion migration behavior, as comprehensively revealed by the time-of-flight secondary ion mass spectrometry (TOF-SIMS), optical microscopy and galvanostatic measurements. On one hand, the small-sized Sn2+ cations can tighten the lattice structure to enhance the Pb/Sn-X (X=I and Br) ionic bonds, thereby effectively immobilizing the halide ions. On the other hand, Sn substitution can significantly reduce anti-site defects, such as ICs and IPb, which are considered potential pathways for ion migration. With these advantages, ion migration is greatly suppressed in Sn-Pb alloyed inorganic perovskites, resulting in reduced hysteresis and improved operational stability of PSC devices. |
| format | Article |
| id | doaj-art-04030fd9376a47fc8cd487809a788bc2 |
| institution | DOAJ |
| issn | 2791-0091 2790-8119 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | Tsinghua University Press |
| record_format | Article |
| series | Nano Research Energy |
| spelling | doaj-art-04030fd9376a47fc8cd487809a788bc22025-08-20T03:12:16ZengTsinghua University PressNano Research Energy2791-00912790-81192025-06-0142e912016610.26599/NRE.2025.9120166Understanding ion migration suppression in all-inorganic mixed halide perovskites via tin-lead alloyingXinyu Li0Yanbo Shang1Xue Wang2Zhimin Fang3Tianao Hou4Dehan Li5Shuang Gao6Tao Chen7Xu Pan8Zhengguo Xiao9Shangfeng Yang10State Key Laboratory of Precision and Intelligent Chemistry, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), School of Chemistry and Materials Science, University of Science and Technology of China, Hefei 230026, ChinaState Key Laboratory of Precision and Intelligent Chemistry, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), School of Chemistry and Materials Science, University of Science and Technology of China, Hefei 230026, ChinaState Key Laboratory of Precision and Intelligent Chemistry, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), School of Chemistry and Materials Science, University of Science and Technology of China, Hefei 230026, ChinaInstitute of Technology for Carbon Neutralization, Yangzhou University, Yangzhou 225127, ChinaState Key Laboratory of Precision and Intelligent Chemistry, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), School of Chemistry and Materials Science, University of Science and Technology of China, Hefei 230026, ChinaState Key Laboratory of Precision and Intelligent Chemistry, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), School of Chemistry and Materials Science, University of Science and Technology of China, Hefei 230026, ChinaState Key Laboratory of Precision and Intelligent Chemistry, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), School of Chemistry and Materials Science, University of Science and Technology of China, Hefei 230026, ChinaState Key Laboratory of Precision and Intelligent Chemistry, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), School of Chemistry and Materials Science, University of Science and Technology of China, Hefei 230026, ChinaHefei Institutes of Physical Science (HIPS), Chinese Academy of Sciences, Hefei 230031, ChinaDepartment of Physics, CAS Key Laboratory of Strongly-Coupled Quantum Matter Physics, University of Science and Technology of China, Hefei 230026, ChinaState Key Laboratory of Precision and Intelligent Chemistry, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), School of Chemistry and Materials Science, University of Science and Technology of China, Hefei 230026, ChinaAll-inorganic perovskites are advantageous in terms of improved thermal stability compared to organic-inorganic counterparts. However, the ion migration-induced hysteresis significantly undermines the long-term operational stability of all-inorganic perovskite solar cells (PSCs), particularly in mixed halide perovskites. Herein, we report that tin-lead (Sn-Pb) alloying for all-inorganic mixed halide perovskites can effectively inhibit the ion migration behavior, as comprehensively revealed by the time-of-flight secondary ion mass spectrometry (TOF-SIMS), optical microscopy and galvanostatic measurements. On one hand, the small-sized Sn2+ cations can tighten the lattice structure to enhance the Pb/Sn-X (X=I and Br) ionic bonds, thereby effectively immobilizing the halide ions. On the other hand, Sn substitution can significantly reduce anti-site defects, such as ICs and IPb, which are considered potential pathways for ion migration. With these advantages, ion migration is greatly suppressed in Sn-Pb alloyed inorganic perovskites, resulting in reduced hysteresis and improved operational stability of PSC devices.https://www.sciopen.com/article/10.26599/NRE.2025.9120166all-inorganic perovskitesolar cellslead-tin alloyingion migrationdeep level defect |
| spellingShingle | Xinyu Li Yanbo Shang Xue Wang Zhimin Fang Tianao Hou Dehan Li Shuang Gao Tao Chen Xu Pan Zhengguo Xiao Shangfeng Yang Understanding ion migration suppression in all-inorganic mixed halide perovskites via tin-lead alloying Nano Research Energy all-inorganic perovskite solar cells lead-tin alloying ion migration deep level defect |
| title | Understanding ion migration suppression in all-inorganic mixed halide perovskites via tin-lead alloying |
| title_full | Understanding ion migration suppression in all-inorganic mixed halide perovskites via tin-lead alloying |
| title_fullStr | Understanding ion migration suppression in all-inorganic mixed halide perovskites via tin-lead alloying |
| title_full_unstemmed | Understanding ion migration suppression in all-inorganic mixed halide perovskites via tin-lead alloying |
| title_short | Understanding ion migration suppression in all-inorganic mixed halide perovskites via tin-lead alloying |
| title_sort | understanding ion migration suppression in all inorganic mixed halide perovskites via tin lead alloying |
| topic | all-inorganic perovskite solar cells lead-tin alloying ion migration deep level defect |
| url | https://www.sciopen.com/article/10.26599/NRE.2025.9120166 |
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