Spontaneous flexoelectricity in cubic lead-halide perovskite MAPbBr$_3$
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arXiv
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| Format: | Preprint |
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2025
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| author | Rak, Dmytro Lorenc, Dusan Zhumekenov, Ayan A. Bakr, Osman M. Alpichshev, Zhanybek |
| author_facet | Rak, Dmytro Lorenc, Dusan Zhumekenov, Ayan A. Bakr, Osman M. Alpichshev, Zhanybek |
| contents | Lead-halide perovskites exhibit remarkable efficiency in photovoltaics, driven by exceptionally long carrier diffusion lengths and recombination times. Paradoxically, this performance persists even in defect-rich, solution-grown samples. Here, we use a suite of optical and charge transport measurements to reveal that key optoelectronic properties of perovskites arise from localized flexoelectric polarization confined to the interfaces between domains of spontaneous strain, present even in nominally cubic single crystals. This insight provides a microscopic link between structural composition and charge transport in these materials, reconciling conflicting prior observations and offering new design principles for perovskite-based solar cells. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_11434 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Spontaneous flexoelectricity in cubic lead-halide perovskite MAPbBr$_3$ Rak, Dmytro Lorenc, Dusan Zhumekenov, Ayan A. Bakr, Osman M. Alpichshev, Zhanybek Materials Science Mesoscale and Nanoscale Physics Other Condensed Matter Lead-halide perovskites exhibit remarkable efficiency in photovoltaics, driven by exceptionally long carrier diffusion lengths and recombination times. Paradoxically, this performance persists even in defect-rich, solution-grown samples. Here, we use a suite of optical and charge transport measurements to reveal that key optoelectronic properties of perovskites arise from localized flexoelectric polarization confined to the interfaces between domains of spontaneous strain, present even in nominally cubic single crystals. This insight provides a microscopic link between structural composition and charge transport in these materials, reconciling conflicting prior observations and offering new design principles for perovskite-based solar cells. |
| title | Spontaneous flexoelectricity in cubic lead-halide perovskite MAPbBr$_3$ |
| topic | Materials Science Mesoscale and Nanoscale Physics Other Condensed Matter |
| url | https://arxiv.org/abs/2503.11434 |