Cs0.15FA0.85PbI3/CsxFA1-xPbI3 Core/Shell Heterostructure for Highly Stable and Efficient Perovskite Solar Cells
Summary: Dissociation of organic molecules is one critical factor leading to degradation of perovskite solar cells. The much-improved thermal stability of formamidinium (FA) can significantly reduce molecular dissociation; however, FA-based perovskite suffers from high defect density, which affects...
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| Format: | Article |
| Language: | English |
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Elsevier
2020-10-01
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| Series: | Cell Reports Physical Science |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666386420302393 |
| _version_ | 1818561101424492544 |
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| author | Zijian Peng Qi Wei Hao Chen Yawen Liu Fei Wang Xianyuan Jiang Weiyan Liu Wenjia Zhou Shengjie Ling Zhijun Ning |
| author_facet | Zijian Peng Qi Wei Hao Chen Yawen Liu Fei Wang Xianyuan Jiang Weiyan Liu Wenjia Zhou Shengjie Ling Zhijun Ning |
| author_sort | Zijian Peng |
| collection | DOAJ |
| description | Summary: Dissociation of organic molecules is one critical factor leading to degradation of perovskite solar cells. The much-improved thermal stability of formamidinium (FA) can significantly reduce molecular dissociation; however, FA-based perovskite suffers from high defect density, which affects efficiency and long-term stability. In this work, based on a precise ion-exchange reaction at the grain surface, we fabricate a Cs0.15FA0.85PbI3/CsxFA1-xPbI3 heterostructure with a Cs-rich CsxFA1-xPbI3 quasi-shell structure. The Cs-rich inorganic structure on the perovskite surface increases defect formation energy and reduces defect density, leading to a power conversion efficiency of 20.7%. The encapsulated device maintains 95% of its initial efficiency after 1,000 h of continuous operation, corresponding to a calculated lifetime approaching 2 years. The device can operate at 60°C for 250 h and at 85°C for over 3,000 min, which is one of the best operational stabilities for CsxFA1-xPbI3-based devices. |
| first_indexed | 2024-12-14T00:46:38Z |
| format | Article |
| id | doaj.art-73c8b0f7af334aa5ab66e4d3f08fc1e7 |
| institution | Directory Open Access Journal |
| issn | 2666-3864 |
| language | English |
| last_indexed | 2024-12-14T00:46:38Z |
| publishDate | 2020-10-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Cell Reports Physical Science |
| spelling | doaj.art-73c8b0f7af334aa5ab66e4d3f08fc1e72022-12-21T23:24:05ZengElsevierCell Reports Physical Science2666-38642020-10-01110100224Cs0.15FA0.85PbI3/CsxFA1-xPbI3 Core/Shell Heterostructure for Highly Stable and Efficient Perovskite Solar CellsZijian Peng0Qi Wei1Hao Chen2Yawen Liu3Fei Wang4Xianyuan Jiang5Weiyan Liu6Wenjia Zhou7Shengjie Ling8Zhijun Ning9School of Physical Science and Technology, ShanghaiTech University, 393 Middle Huaxia Road, Pudong, Shanghai 201210, ChinaSchool of Physical Science and Technology, ShanghaiTech University, 393 Middle Huaxia Road, Pudong, Shanghai 201210, ChinaSchool of Physical Science and Technology, ShanghaiTech University, 393 Middle Huaxia Road, Pudong, Shanghai 201210, China; Shanghai Institute of Ceramics, Chinese Academy of Sciences, Dingxi Road, Changning, Shanghai 200050, China; University of the Chinese Academy of Sciences, Yuquan Road, Shijingshan, Beijing 100049, ChinaSchool of Physical Science and Technology, ShanghaiTech University, 393 Middle Huaxia Road, Pudong, Shanghai 201210, ChinaSchool of Physical Science and Technology, ShanghaiTech University, 393 Middle Huaxia Road, Pudong, Shanghai 201210, China; Shanghai Institute of Ceramics, Chinese Academy of Sciences, Dingxi Road, Changning, Shanghai 200050, China; University of the Chinese Academy of Sciences, Yuquan Road, Shijingshan, Beijing 100049, ChinaSchool of Physical Science and Technology, ShanghaiTech University, 393 Middle Huaxia Road, Pudong, Shanghai 201210, China; Shanghai Institute of Ceramics, Chinese Academy of Sciences, Dingxi Road, Changning, Shanghai 200050, China; University of the Chinese Academy of Sciences, Yuquan Road, Shijingshan, Beijing 100049, ChinaSchool of Physical Science and Technology, ShanghaiTech University, 393 Middle Huaxia Road, Pudong, Shanghai 201210, ChinaSchool of Physical Science and Technology, ShanghaiTech University, 393 Middle Huaxia Road, Pudong, Shanghai 201210, ChinaSchool of Physical Science and Technology, ShanghaiTech University, 393 Middle Huaxia Road, Pudong, Shanghai 201210, ChinaSchool of Physical Science and Technology, ShanghaiTech University, 393 Middle Huaxia Road, Pudong, Shanghai 201210, China; Corresponding authorSummary: Dissociation of organic molecules is one critical factor leading to degradation of perovskite solar cells. The much-improved thermal stability of formamidinium (FA) can significantly reduce molecular dissociation; however, FA-based perovskite suffers from high defect density, which affects efficiency and long-term stability. In this work, based on a precise ion-exchange reaction at the grain surface, we fabricate a Cs0.15FA0.85PbI3/CsxFA1-xPbI3 heterostructure with a Cs-rich CsxFA1-xPbI3 quasi-shell structure. The Cs-rich inorganic structure on the perovskite surface increases defect formation energy and reduces defect density, leading to a power conversion efficiency of 20.7%. The encapsulated device maintains 95% of its initial efficiency after 1,000 h of continuous operation, corresponding to a calculated lifetime approaching 2 years. The device can operate at 60°C for 250 h and at 85°C for over 3,000 min, which is one of the best operational stabilities for CsxFA1-xPbI3-based devices.http://www.sciencedirect.com/science/article/pii/S2666386420302393energy conversionheterostructuremethylamine freeperovskite solar cellsphotovoltaics |
| spellingShingle | Zijian Peng Qi Wei Hao Chen Yawen Liu Fei Wang Xianyuan Jiang Weiyan Liu Wenjia Zhou Shengjie Ling Zhijun Ning Cs0.15FA0.85PbI3/CsxFA1-xPbI3 Core/Shell Heterostructure for Highly Stable and Efficient Perovskite Solar Cells Cell Reports Physical Science energy conversion heterostructure methylamine free perovskite solar cells photovoltaics |
| title | Cs0.15FA0.85PbI3/CsxFA1-xPbI3 Core/Shell Heterostructure for Highly Stable and Efficient Perovskite Solar Cells |
| title_full | Cs0.15FA0.85PbI3/CsxFA1-xPbI3 Core/Shell Heterostructure for Highly Stable and Efficient Perovskite Solar Cells |
| title_fullStr | Cs0.15FA0.85PbI3/CsxFA1-xPbI3 Core/Shell Heterostructure for Highly Stable and Efficient Perovskite Solar Cells |
| title_full_unstemmed | Cs0.15FA0.85PbI3/CsxFA1-xPbI3 Core/Shell Heterostructure for Highly Stable and Efficient Perovskite Solar Cells |
| title_short | Cs0.15FA0.85PbI3/CsxFA1-xPbI3 Core/Shell Heterostructure for Highly Stable and Efficient Perovskite Solar Cells |
| title_sort | cs0 15fa0 85pbi3 csxfa1 xpbi3 core shell heterostructure for highly stable and efficient perovskite solar cells |
| topic | energy conversion heterostructure methylamine free perovskite solar cells photovoltaics |
| url | http://www.sciencedirect.com/science/article/pii/S2666386420302393 |
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