MDACl<sub>2</sub>-Modified SnO<sub>2</sub> Film for Efficient Planar Perovskite Solar Cells
The electron transport layer (ETL) with excellent charge extraction and transport ability is one of the key components of high-performance perovskite solar cells (PSCs). SnO<sub>2</sub> has been considered as a more promising ETL for the future commercialization of PSCs due to its excell...
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| Format: | Article |
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MDPI AG
2023-03-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/28/6/2668 |
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| author | Yaodong Xiao Xiangqian Cui Boyuan Xiang Yanping Chen Chaoyue Zhao Lihong Wang Chuqun Yang Guangye Zhang Chen Xie Yulai Han Mingxia Qiu Shunpu Li Peng You |
| author_facet | Yaodong Xiao Xiangqian Cui Boyuan Xiang Yanping Chen Chaoyue Zhao Lihong Wang Chuqun Yang Guangye Zhang Chen Xie Yulai Han Mingxia Qiu Shunpu Li Peng You |
| author_sort | Yaodong Xiao |
| collection | DOAJ |
| description | The electron transport layer (ETL) with excellent charge extraction and transport ability is one of the key components of high-performance perovskite solar cells (PSCs). SnO<sub>2</sub> has been considered as a more promising ETL for the future commercialization of PSCs due to its excellent photoelectric properties and easy processing. Herein, we propose a facile and effective ETL modification strategy based on the incorporation of methylenediammonium dichloride (MDACl<sub>2</sub>) into the SnO<sub>2</sub> precursor colloidal solution. The effects of MDACl<sub>2</sub> incorporation on charge transport, defect passivation, perovskite crystallization, and PSC performance are systematically investigated. First, the surface defects of the SnO<sub>2</sub> film are effectively passivated, resulting in the increased conductivity of the SnO<sub>2</sub> film, which is conducive to electron extraction and transport. Second, the MDACl<sub>2</sub> modification contributes to the formation of high-quality perovskite films with improved crystallinity and reduced defect density. Furthermore, a more suitable energy level alignment is achieved at the ETL/perovskite interface, which facilitates the charge transport due to the lower energy barrier. Consequently, the MDACl<sub>2</sub>-modified PSCs exhibit a champion efficiency of 22.30% compared with 19.62% of the control device, and the device stability is also significantly improved. |
| first_indexed | 2024-03-11T06:07:31Z |
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| id | doaj.art-939380c5550e4d50b4f27c6153d46ef1 |
| institution | Directory Open Access Journal |
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| language | English |
| last_indexed | 2024-03-11T06:07:31Z |
| publishDate | 2023-03-01 |
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| series | Molecules |
| spelling | doaj.art-939380c5550e4d50b4f27c6153d46ef12023-11-17T12:53:31ZengMDPI AGMolecules1420-30492023-03-01286266810.3390/molecules28062668MDACl<sub>2</sub>-Modified SnO<sub>2</sub> Film for Efficient Planar Perovskite Solar CellsYaodong Xiao0Xiangqian Cui1Boyuan Xiang2Yanping Chen3Chaoyue Zhao4Lihong Wang5Chuqun Yang6Guangye Zhang7Chen Xie8Yulai Han9Mingxia Qiu10Shunpu Li11Peng You12College of New Materials and New Energies, Shenzhen Technology University, Shenzhen 518118, ChinaCollege of New Materials and New Energies, Shenzhen Technology University, Shenzhen 518118, ChinaCollege of New Materials and New Energies, Shenzhen Technology University, Shenzhen 518118, ChinaCollege of New Materials and New Energies, Shenzhen Technology University, Shenzhen 518118, ChinaCollege of New Materials and New Energies, Shenzhen Technology University, Shenzhen 518118, ChinaCollege of New Materials and New Energies, Shenzhen Technology University, Shenzhen 518118, ChinaCollege of New Materials and New Energies, Shenzhen Technology University, Shenzhen 518118, ChinaCollege of New Materials and New Energies, Shenzhen Technology University, Shenzhen 518118, ChinaCollege of New Materials and New Energies, Shenzhen Technology University, Shenzhen 518118, ChinaCollege of New Materials and New Energies, Shenzhen Technology University, Shenzhen 518118, ChinaCollege of New Materials and New Energies, Shenzhen Technology University, Shenzhen 518118, ChinaCollege of New Materials and New Energies, Shenzhen Technology University, Shenzhen 518118, ChinaCollege of New Materials and New Energies, Shenzhen Technology University, Shenzhen 518118, ChinaThe electron transport layer (ETL) with excellent charge extraction and transport ability is one of the key components of high-performance perovskite solar cells (PSCs). SnO<sub>2</sub> has been considered as a more promising ETL for the future commercialization of PSCs due to its excellent photoelectric properties and easy processing. Herein, we propose a facile and effective ETL modification strategy based on the incorporation of methylenediammonium dichloride (MDACl<sub>2</sub>) into the SnO<sub>2</sub> precursor colloidal solution. The effects of MDACl<sub>2</sub> incorporation on charge transport, defect passivation, perovskite crystallization, and PSC performance are systematically investigated. First, the surface defects of the SnO<sub>2</sub> film are effectively passivated, resulting in the increased conductivity of the SnO<sub>2</sub> film, which is conducive to electron extraction and transport. Second, the MDACl<sub>2</sub> modification contributes to the formation of high-quality perovskite films with improved crystallinity and reduced defect density. Furthermore, a more suitable energy level alignment is achieved at the ETL/perovskite interface, which facilitates the charge transport due to the lower energy barrier. Consequently, the MDACl<sub>2</sub>-modified PSCs exhibit a champion efficiency of 22.30% compared with 19.62% of the control device, and the device stability is also significantly improved.https://www.mdpi.com/1420-3049/28/6/2668perovskite solar cellsSnO<sub>2</sub> modificationMDACl<sub>2</sub>defect passivation |
| spellingShingle | Yaodong Xiao Xiangqian Cui Boyuan Xiang Yanping Chen Chaoyue Zhao Lihong Wang Chuqun Yang Guangye Zhang Chen Xie Yulai Han Mingxia Qiu Shunpu Li Peng You MDACl<sub>2</sub>-Modified SnO<sub>2</sub> Film for Efficient Planar Perovskite Solar Cells Molecules perovskite solar cells SnO<sub>2</sub> modification MDACl<sub>2</sub> defect passivation |
| title | MDACl<sub>2</sub>-Modified SnO<sub>2</sub> Film for Efficient Planar Perovskite Solar Cells |
| title_full | MDACl<sub>2</sub>-Modified SnO<sub>2</sub> Film for Efficient Planar Perovskite Solar Cells |
| title_fullStr | MDACl<sub>2</sub>-Modified SnO<sub>2</sub> Film for Efficient Planar Perovskite Solar Cells |
| title_full_unstemmed | MDACl<sub>2</sub>-Modified SnO<sub>2</sub> Film for Efficient Planar Perovskite Solar Cells |
| title_short | MDACl<sub>2</sub>-Modified SnO<sub>2</sub> Film for Efficient Planar Perovskite Solar Cells |
| title_sort | mdacl sub 2 sub modified sno sub 2 sub film for efficient planar perovskite solar cells |
| topic | perovskite solar cells SnO<sub>2</sub> modification MDACl<sub>2</sub> defect passivation |
| url | https://www.mdpi.com/1420-3049/28/6/2668 |
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