Phase transitions of formamidinium lead iodide perovskite under pressure
The pressure-induced structural evolution of formamidinium-based perovskite FAPbI3 was investigated using in situ synchrotron X-ray diffraction and laser-excited photoluminescence methods. Cubic α-FAPbI3 ( Pm3̅ m) partially and irreversibly transformed to hexagonal δ-FAPbI3 ( P63 mc) at a pressure l...
| Main Authors: | , , , , , , , , , |
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| Format: | Journal Article |
| Language: | English |
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2020
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| Online Access: | https://hdl.handle.net/10356/139266 |
| _version_ | 1811692287905759232 |
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| author | Jiang, Shaojie Luan, Yiliang Jang, Joon Ik Baikie, Tom Huang, Xin Li, Ruipeng Saouma, Felix Ochieng Wang, Zhongwu White, Timothy John Fang, Jiye |
| author2 | School of Materials Science & Engineering |
| author_facet | School of Materials Science & Engineering Jiang, Shaojie Luan, Yiliang Jang, Joon Ik Baikie, Tom Huang, Xin Li, Ruipeng Saouma, Felix Ochieng Wang, Zhongwu White, Timothy John Fang, Jiye |
| author_sort | Jiang, Shaojie |
| collection | NTU |
| description | The pressure-induced structural evolution of formamidinium-based perovskite FAPbI3 was investigated using in situ synchrotron X-ray diffraction and laser-excited photoluminescence methods. Cubic α-FAPbI3 ( Pm3̅ m) partially and irreversibly transformed to hexagonal δ-FAPbI3 ( P63 mc) at a pressure less than 0.1 GPa. Structural transitions of α-FAPbI3 followed the sequence of Pm3̅ m → P4/ mbm → Im3̅ → partial amorphous during compression to 6.59 GPa, whereas the δ-phase converted to an orthorhombic Cmc21 structure between 1.26 and 1.73 GPa. During decompression, FAPbI3 recovered the P63 mc structure of the δ-phase as a minor component (∼18 wt %) from 2.41-1.40 GPa and the Pm3̅ m structure of the α-phase becomes dominant (∼82 wt %) at 0.10 GPa but with an increased fraction of δ-FAPbI3. The photoluminescence behaviors from both the α- and δ-forms were likely controlled by radiative recombination at the defect levels rather than band-edge emission during pressure cycling. FAPbI3 polymorphism is exquisitely sensitive to pressure. While modest pressures can engineer FAPbI3-based photovoltaic devices, irreversible δ-phase crystallization may be a limiting factor and should be taken into account. |
| first_indexed | 2024-10-01T06:33:24Z |
| format | Journal Article |
| id | ntu-10356/139266 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:33:24Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1392662021-01-08T02:57:52Z Phase transitions of formamidinium lead iodide perovskite under pressure Jiang, Shaojie Luan, Yiliang Jang, Joon Ik Baikie, Tom Huang, Xin Li, Ruipeng Saouma, Felix Ochieng Wang, Zhongwu White, Timothy John Fang, Jiye School of Materials Science & Engineering Energy Research Institute @ NTU (ERI@N) Engineering::Chemical engineering Compression Physical and Chemical Processes The pressure-induced structural evolution of formamidinium-based perovskite FAPbI3 was investigated using in situ synchrotron X-ray diffraction and laser-excited photoluminescence methods. Cubic α-FAPbI3 ( Pm3̅ m) partially and irreversibly transformed to hexagonal δ-FAPbI3 ( P63 mc) at a pressure less than 0.1 GPa. Structural transitions of α-FAPbI3 followed the sequence of Pm3̅ m → P4/ mbm → Im3̅ → partial amorphous during compression to 6.59 GPa, whereas the δ-phase converted to an orthorhombic Cmc21 structure between 1.26 and 1.73 GPa. During decompression, FAPbI3 recovered the P63 mc structure of the δ-phase as a minor component (∼18 wt %) from 2.41-1.40 GPa and the Pm3̅ m structure of the α-phase becomes dominant (∼82 wt %) at 0.10 GPa but with an increased fraction of δ-FAPbI3. The photoluminescence behaviors from both the α- and δ-forms were likely controlled by radiative recombination at the defect levels rather than band-edge emission during pressure cycling. FAPbI3 polymorphism is exquisitely sensitive to pressure. While modest pressures can engineer FAPbI3-based photovoltaic devices, irreversible δ-phase crystallization may be a limiting factor and should be taken into account. 2020-05-18T07:33:14Z 2020-05-18T07:33:14Z 2018 Journal Article Jiang, S., Luan, Y., Jang, J. I., Baikie, T., Huang, X., Li, R., . . . Fang, J. (2018). Phase transitions of formamidinium lead iodide perovskite under pressure. Journal of the American Chemical Society, 140(42), 13952-13957. doi:10.1021/jacs.8b09316 0002-7863 https://hdl.handle.net/10356/139266 10.1021/jacs.8b09316 30265811 2-s2.0-85054996962 42 140 13952 13957 en Journal of the American Chemical Society © 2018 American Chemical Society. All rights reserved. |
| spellingShingle | Engineering::Chemical engineering Compression Physical and Chemical Processes Jiang, Shaojie Luan, Yiliang Jang, Joon Ik Baikie, Tom Huang, Xin Li, Ruipeng Saouma, Felix Ochieng Wang, Zhongwu White, Timothy John Fang, Jiye Phase transitions of formamidinium lead iodide perovskite under pressure |
| title | Phase transitions of formamidinium lead iodide perovskite under pressure |
| title_full | Phase transitions of formamidinium lead iodide perovskite under pressure |
| title_fullStr | Phase transitions of formamidinium lead iodide perovskite under pressure |
| title_full_unstemmed | Phase transitions of formamidinium lead iodide perovskite under pressure |
| title_short | Phase transitions of formamidinium lead iodide perovskite under pressure |
| title_sort | phase transitions of formamidinium lead iodide perovskite under pressure |
| topic | Engineering::Chemical engineering Compression Physical and Chemical Processes |
| url | https://hdl.handle.net/10356/139266 |
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