How Do Surface Polar Molecules Contribute to High Open‐Circuit Voltage in Perovskite Solar Cells?
Abstract To date, the improvement of open‐circuit voltage (VOC) offers a breakthrough for the performance of perovskite solar cells (PSCs) toward their theoretical limit. Surface modification through organic ammonium halide salts (e.g., phenethylammonium ions PEA+ and phenmethylammonium ions PMA+) i...
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| Format: | Article |
| Language: | English |
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Wiley
2023-06-01
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| Series: | Advanced Science |
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| Online Access: | https://doi.org/10.1002/advs.202205072 |
| _version_ | 1797804409747406848 |
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| author | Yinyi Ma Chengsong Zeng Peng Zeng Yuchao Hu Faming Li Zhonghao Zheng Minchao Qin Xinhui Lu Mingzhen Liu |
| author_facet | Yinyi Ma Chengsong Zeng Peng Zeng Yuchao Hu Faming Li Zhonghao Zheng Minchao Qin Xinhui Lu Mingzhen Liu |
| author_sort | Yinyi Ma |
| collection | DOAJ |
| description | Abstract To date, the improvement of open‐circuit voltage (VOC) offers a breakthrough for the performance of perovskite solar cells (PSCs) toward their theoretical limit. Surface modification through organic ammonium halide salts (e.g., phenethylammonium ions PEA+ and phenmethylammonium ions PMA+) is one of the most straightforward strategies to suppress defect density, thereby leading to improved VOC. However, the mechanism underlying the high voltage remains unclear. Here, polar molecular PMA+ is applied at the interface between perovskite and hole transporting layer and a remarkably high VOC of 1.175 V is obtained which corresponds to an increase of over 100 mV in comparison to the control device. It is revealed that the equivalent passivation effect of surface dipole effectively improves the splitting of the hole quasi‐Fermi level. Ultimately the combined effect of defect suppression and surface dipole equivalent passivation effect leads to an overall increase in significantly enhanced VOC. The resulted PSCs device reaches an efficiency of up to 24.10%. Contributions are identified here by the surface polar molecules to the high VOC in PSCs. A fundamental mechanism is suggested by use of polar molecules which enables further high voltage, leading ways to highly efficient perovskite‐based solar cells. |
| first_indexed | 2024-03-13T05:36:46Z |
| format | Article |
| id | doaj.art-a4bdf30dfee34041be81b5c6b50f0263 |
| institution | Directory Open Access Journal |
| issn | 2198-3844 |
| language | English |
| last_indexed | 2024-03-13T05:36:46Z |
| publishDate | 2023-06-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advanced Science |
| spelling | doaj.art-a4bdf30dfee34041be81b5c6b50f02632023-06-14T07:18:56ZengWileyAdvanced Science2198-38442023-06-011017n/an/a10.1002/advs.202205072How Do Surface Polar Molecules Contribute to High Open‐Circuit Voltage in Perovskite Solar Cells?Yinyi Ma0Chengsong Zeng1Peng Zeng2Yuchao Hu3Faming Li4Zhonghao Zheng5Minchao Qin6Xinhui Lu7Mingzhen Liu8School of Materials and Energy University of Electronic Science and Technology of China Chengdu 611731 P. R. ChinaSchool of Materials and Energy University of Electronic Science and Technology of China Chengdu 611731 P. R. ChinaSchool of Materials and Energy University of Electronic Science and Technology of China Chengdu 611731 P. R. ChinaSchool of Materials and Energy University of Electronic Science and Technology of China Chengdu 611731 P. R. ChinaSchool of Materials and Energy University of Electronic Science and Technology of China Chengdu 611731 P. R. ChinaSchool of Materials and Energy University of Electronic Science and Technology of China Chengdu 611731 P. R. ChinaDepartment of Physics The Chinese University of Hong Kong Shatin Hong Kong SAR 999077 ChinaDepartment of Physics The Chinese University of Hong Kong Shatin Hong Kong SAR 999077 ChinaSchool of Materials and Energy University of Electronic Science and Technology of China Chengdu 611731 P. R. ChinaAbstract To date, the improvement of open‐circuit voltage (VOC) offers a breakthrough for the performance of perovskite solar cells (PSCs) toward their theoretical limit. Surface modification through organic ammonium halide salts (e.g., phenethylammonium ions PEA+ and phenmethylammonium ions PMA+) is one of the most straightforward strategies to suppress defect density, thereby leading to improved VOC. However, the mechanism underlying the high voltage remains unclear. Here, polar molecular PMA+ is applied at the interface between perovskite and hole transporting layer and a remarkably high VOC of 1.175 V is obtained which corresponds to an increase of over 100 mV in comparison to the control device. It is revealed that the equivalent passivation effect of surface dipole effectively improves the splitting of the hole quasi‐Fermi level. Ultimately the combined effect of defect suppression and surface dipole equivalent passivation effect leads to an overall increase in significantly enhanced VOC. The resulted PSCs device reaches an efficiency of up to 24.10%. Contributions are identified here by the surface polar molecules to the high VOC in PSCs. A fundamental mechanism is suggested by use of polar molecules which enables further high voltage, leading ways to highly efficient perovskite‐based solar cells.https://doi.org/10.1002/advs.202205072dipolefield effect passivationopen‐circuit voltagesurface modification |
| spellingShingle | Yinyi Ma Chengsong Zeng Peng Zeng Yuchao Hu Faming Li Zhonghao Zheng Minchao Qin Xinhui Lu Mingzhen Liu How Do Surface Polar Molecules Contribute to High Open‐Circuit Voltage in Perovskite Solar Cells? Advanced Science dipole field effect passivation open‐circuit voltage surface modification |
| title | How Do Surface Polar Molecules Contribute to High Open‐Circuit Voltage in Perovskite Solar Cells? |
| title_full | How Do Surface Polar Molecules Contribute to High Open‐Circuit Voltage in Perovskite Solar Cells? |
| title_fullStr | How Do Surface Polar Molecules Contribute to High Open‐Circuit Voltage in Perovskite Solar Cells? |
| title_full_unstemmed | How Do Surface Polar Molecules Contribute to High Open‐Circuit Voltage in Perovskite Solar Cells? |
| title_short | How Do Surface Polar Molecules Contribute to High Open‐Circuit Voltage in Perovskite Solar Cells? |
| title_sort | how do surface polar molecules contribute to high open circuit voltage in perovskite solar cells |
| topic | dipole field effect passivation open‐circuit voltage surface modification |
| url | https://doi.org/10.1002/advs.202205072 |
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