Highly Efficient 2D/3D Mixed-Dimensional Cs<sub>2</sub>PbI<sub>2</sub>Cl<sub>2</sub>/CsPbI<sub>2.5</sub>Br<sub>0.5</sub> Perovskite Solar Cells Prepared by Methanol/Isopropanol Treatment
All-inorganic perovskite solar cells are attractive photovoltaic devices because of their excellent optoelectronic performance and thermal stability. Unfortunately, the currently used efficient inorganic perovskite materials can spontaneously transform into undesirable phases without light-absorptio...
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MDPI AG
2023-03-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/13/7/1239 |
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| author | Bicui Li Shujie Yang Huifang Han Huijing Liu Hang Zhao Zhenzhen Li Jia Xu Jianxi Yao |
| author_facet | Bicui Li Shujie Yang Huifang Han Huijing Liu Hang Zhao Zhenzhen Li Jia Xu Jianxi Yao |
| author_sort | Bicui Li |
| collection | DOAJ |
| description | All-inorganic perovskite solar cells are attractive photovoltaic devices because of their excellent optoelectronic performance and thermal stability. Unfortunately, the currently used efficient inorganic perovskite materials can spontaneously transform into undesirable phases without light-absorption properties. Studies have been carried out to stabilize all-inorganic perovskite by mixing low-dimensional perovskite. Compared with organic two-dimensional (2D) perovskite, inorganic 2D Cs<sub>2</sub>PbI<sub>2</sub>Cl<sub>2</sub> shows superior thermal stability. Our group has successfully fabricated 2D/3D mixed-dimensional Cs<sub>2</sub>PbI<sub>2</sub>Cl<sub>2</sub>/CsPbI<sub>2.5</sub>Br<sub>0.5</sub> films with increasing phase stability. The high boiling point of dimethyl sulfoxide (DMSO) makes it a preferred solvent in the preparation of Cs<sub>2</sub>PbI<sub>2</sub>Cl<sub>2</sub>/CsPbI<sub>2.5</sub>Br<sub>0.5</sub> inorganic perovskite. When the perovskite films are prepared by the one-step solution method, it is difficult to evaporate the residual solvent molecules from the prefabricated films, resulting in films with rough surface morphology and high defect density. This study used the rapid precipitation method to control the formation of perovskite by treating it with methanol/isopropanol (MT/IPA) mixed solvent to produce densely packed, smooth, and high-crystallized perovskite films. The bulk defects and the carrier transport barrier of the interface were effectively reduced, which decreased the recombination of the carriers in the device. As a result, this effectively improved photoelectric performance. Through treatment with MT/IPA, the photoelectric conversion efficiency (PCE) of solar cells prepared in the N<sub>2</sub> atmosphere increased from 13.44% to 14.10%, and the PCE of the device prepared in the air increased from 3.52% to 8.91%. |
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| language | English |
| last_indexed | 2024-03-11T05:29:07Z |
| publishDate | 2023-03-01 |
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| spelling | doaj.art-c2f1fb02215a4682832179aaa5ddff532023-11-17T17:17:43ZengMDPI AGNanomaterials2079-49912023-03-01137123910.3390/nano13071239Highly Efficient 2D/3D Mixed-Dimensional Cs<sub>2</sub>PbI<sub>2</sub>Cl<sub>2</sub>/CsPbI<sub>2.5</sub>Br<sub>0.5</sub> Perovskite Solar Cells Prepared by Methanol/Isopropanol TreatmentBicui Li0Shujie Yang1Huifang Han2Huijing Liu3Hang Zhao4Zhenzhen Li5Jia Xu6Jianxi Yao7State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, ChinaState Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, ChinaState Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, ChinaState Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, ChinaCollege of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063210, ChinaCollege of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063210, ChinaState Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, ChinaState Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, ChinaAll-inorganic perovskite solar cells are attractive photovoltaic devices because of their excellent optoelectronic performance and thermal stability. Unfortunately, the currently used efficient inorganic perovskite materials can spontaneously transform into undesirable phases without light-absorption properties. Studies have been carried out to stabilize all-inorganic perovskite by mixing low-dimensional perovskite. Compared with organic two-dimensional (2D) perovskite, inorganic 2D Cs<sub>2</sub>PbI<sub>2</sub>Cl<sub>2</sub> shows superior thermal stability. Our group has successfully fabricated 2D/3D mixed-dimensional Cs<sub>2</sub>PbI<sub>2</sub>Cl<sub>2</sub>/CsPbI<sub>2.5</sub>Br<sub>0.5</sub> films with increasing phase stability. The high boiling point of dimethyl sulfoxide (DMSO) makes it a preferred solvent in the preparation of Cs<sub>2</sub>PbI<sub>2</sub>Cl<sub>2</sub>/CsPbI<sub>2.5</sub>Br<sub>0.5</sub> inorganic perovskite. When the perovskite films are prepared by the one-step solution method, it is difficult to evaporate the residual solvent molecules from the prefabricated films, resulting in films with rough surface morphology and high defect density. This study used the rapid precipitation method to control the formation of perovskite by treating it with methanol/isopropanol (MT/IPA) mixed solvent to produce densely packed, smooth, and high-crystallized perovskite films. The bulk defects and the carrier transport barrier of the interface were effectively reduced, which decreased the recombination of the carriers in the device. As a result, this effectively improved photoelectric performance. Through treatment with MT/IPA, the photoelectric conversion efficiency (PCE) of solar cells prepared in the N<sub>2</sub> atmosphere increased from 13.44% to 14.10%, and the PCE of the device prepared in the air increased from 3.52% to 8.91%.https://www.mdpi.com/2079-4991/13/7/1239mixed-dimensional perovskiteall-inorganic perovskiteCs<sub>2</sub>PbI<sub>2</sub>Cl<sub>2</sub> |
| spellingShingle | Bicui Li Shujie Yang Huifang Han Huijing Liu Hang Zhao Zhenzhen Li Jia Xu Jianxi Yao Highly Efficient 2D/3D Mixed-Dimensional Cs<sub>2</sub>PbI<sub>2</sub>Cl<sub>2</sub>/CsPbI<sub>2.5</sub>Br<sub>0.5</sub> Perovskite Solar Cells Prepared by Methanol/Isopropanol Treatment Nanomaterials mixed-dimensional perovskite all-inorganic perovskite Cs<sub>2</sub>PbI<sub>2</sub>Cl<sub>2</sub> |
| title | Highly Efficient 2D/3D Mixed-Dimensional Cs<sub>2</sub>PbI<sub>2</sub>Cl<sub>2</sub>/CsPbI<sub>2.5</sub>Br<sub>0.5</sub> Perovskite Solar Cells Prepared by Methanol/Isopropanol Treatment |
| title_full | Highly Efficient 2D/3D Mixed-Dimensional Cs<sub>2</sub>PbI<sub>2</sub>Cl<sub>2</sub>/CsPbI<sub>2.5</sub>Br<sub>0.5</sub> Perovskite Solar Cells Prepared by Methanol/Isopropanol Treatment |
| title_fullStr | Highly Efficient 2D/3D Mixed-Dimensional Cs<sub>2</sub>PbI<sub>2</sub>Cl<sub>2</sub>/CsPbI<sub>2.5</sub>Br<sub>0.5</sub> Perovskite Solar Cells Prepared by Methanol/Isopropanol Treatment |
| title_full_unstemmed | Highly Efficient 2D/3D Mixed-Dimensional Cs<sub>2</sub>PbI<sub>2</sub>Cl<sub>2</sub>/CsPbI<sub>2.5</sub>Br<sub>0.5</sub> Perovskite Solar Cells Prepared by Methanol/Isopropanol Treatment |
| title_short | Highly Efficient 2D/3D Mixed-Dimensional Cs<sub>2</sub>PbI<sub>2</sub>Cl<sub>2</sub>/CsPbI<sub>2.5</sub>Br<sub>0.5</sub> Perovskite Solar Cells Prepared by Methanol/Isopropanol Treatment |
| title_sort | highly efficient 2d 3d mixed dimensional cs sub 2 sub pbi sub 2 sub cl sub 2 sub cspbi sub 2 5 sub br sub 0 5 sub perovskite solar cells prepared by methanol isopropanol treatment |
| topic | mixed-dimensional perovskite all-inorganic perovskite Cs<sub>2</sub>PbI<sub>2</sub>Cl<sub>2</sub> |
| url | https://www.mdpi.com/2079-4991/13/7/1239 |
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