Ferroelectric domains in methylammonium lead iodide perovskite thin-films
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arXiv
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| Auteurs principaux: | , , , |
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| Format: | Preprint |
| Publié: |
2026
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| _version_ | 1866917473088962560 |
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| author | Röhm, Holger Leonhard, Tobias Hoffmann, Michael J. Colsmann, Alexander |
| author_facet | Röhm, Holger Leonhard, Tobias Hoffmann, Michael J. Colsmann, Alexander |
| contents | We explore the ferroic properties of methylammonium lead iodide perovskite solar cells by Piezoresponse Force Microscopy (PFM). In vertical and horizontal PFM imaging, we find domains of alternating polarization with a width of 90 nm which we identify as polarized ferroelectric domains. High-resolution photo-conductive atomic force micrographs under illumination also show alternating charge carrier extraction patterns which we attribute to the local vertical polarization components within the ferroelectric domains. The correlation of the sample properties with Atomic Force and Kelvin Probe Force Micrographs evidence the piezo-electric nature of the domains. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_07780 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Ferroelectric domains in methylammonium lead iodide perovskite thin-films Röhm, Holger Leonhard, Tobias Hoffmann, Michael J. Colsmann, Alexander Materials Science We explore the ferroic properties of methylammonium lead iodide perovskite solar cells by Piezoresponse Force Microscopy (PFM). In vertical and horizontal PFM imaging, we find domains of alternating polarization with a width of 90 nm which we identify as polarized ferroelectric domains. High-resolution photo-conductive atomic force micrographs under illumination also show alternating charge carrier extraction patterns which we attribute to the local vertical polarization components within the ferroelectric domains. The correlation of the sample properties with Atomic Force and Kelvin Probe Force Micrographs evidence the piezo-electric nature of the domains. |
| title | Ferroelectric domains in methylammonium lead iodide perovskite thin-films |
| topic | Materials Science |
| url | https://arxiv.org/abs/2605.07780 |