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| Main Authors: | , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2026
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2602.23857 |
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| _version_ | 1866917299562217472 |
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| author | Rusch, Pascal Antony, Ann Mary Pegu, Meenakshi Jabrane, Meysoun Saleh, Gabriele Garai, Arghyadeep Asaithambi, Aswin Lauciello, Simone Marras, Sergio De Negri, Serena Solokha, Pavlo Manna, Liberato |
| author_facet | Rusch, Pascal Antony, Ann Mary Pegu, Meenakshi Jabrane, Meysoun Saleh, Gabriele Garai, Arghyadeep Asaithambi, Aswin Lauciello, Simone Marras, Sergio De Negri, Serena Solokha, Pavlo Manna, Liberato |
| contents | Lead-free iodide double perovskites are an interesting class of materials since they combine a relatively low toxicity (compared to the lead counterpart) with the small bandgap typical of iodide-based perovskite structures. Their reported number is small due to their lower structural stability compared to the chloride and bromide analogues, hence their difficult synthesis. The structural constraints that limit stability, on the other hand, can be much relieved in layered, organic-inorganic perovskites. Following this line of thought, we report here a successful fast precipitation route to iodide layered (CnH(2n+1)NH3)4AgBiI8 (n = 10, 12, and 14) double perovskites that borrow concepts from the synthesis of colloidal nanocrystals. X-ray diffraction studies revealed for these compounds a monoclinic crystal structure containing edge-sharing alternated [AgI6] and [BiI6] octahedra. These materials have experimental band gaps of 2.1 eV, as also corroborated by theoretical calculations. We have also investigated their phase transitions by thermal analysis and temperature-dependent diffraction and found them to be similar to their lead-based layered perovskite counterparts. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_23857 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | A Nanocrystal Synthesis Derived Approach to Silver Bismuth Iodide Layered Double Perovskites with Aliphatic Amines: (CnH(2n+1)NH3)4AgBiI8 Rusch, Pascal Antony, Ann Mary Pegu, Meenakshi Jabrane, Meysoun Saleh, Gabriele Garai, Arghyadeep Asaithambi, Aswin Lauciello, Simone Marras, Sergio De Negri, Serena Solokha, Pavlo Manna, Liberato Materials Science Lead-free iodide double perovskites are an interesting class of materials since they combine a relatively low toxicity (compared to the lead counterpart) with the small bandgap typical of iodide-based perovskite structures. Their reported number is small due to their lower structural stability compared to the chloride and bromide analogues, hence their difficult synthesis. The structural constraints that limit stability, on the other hand, can be much relieved in layered, organic-inorganic perovskites. Following this line of thought, we report here a successful fast precipitation route to iodide layered (CnH(2n+1)NH3)4AgBiI8 (n = 10, 12, and 14) double perovskites that borrow concepts from the synthesis of colloidal nanocrystals. X-ray diffraction studies revealed for these compounds a monoclinic crystal structure containing edge-sharing alternated [AgI6] and [BiI6] octahedra. These materials have experimental band gaps of 2.1 eV, as also corroborated by theoretical calculations. We have also investigated their phase transitions by thermal analysis and temperature-dependent diffraction and found them to be similar to their lead-based layered perovskite counterparts. |
| title | A Nanocrystal Synthesis Derived Approach to Silver Bismuth Iodide Layered Double Perovskites with Aliphatic Amines: (CnH(2n+1)NH3)4AgBiI8 |
| topic | Materials Science |
| url | https://arxiv.org/abs/2602.23857 |