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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Poli, Isabella
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (10/10 displayed)
- 2024How Photogenerated I 2 Induces I-Rich Phase Formation in Lead Mixed Halide Perovskitescitations
- 2024How Photogenerated I2 Induces I-Rich Phase Formation in Lead Mixed Halide Perovskitescitations
- 2024Understanding the Surface Chemistry of Tin Halide Perovskitescitations
- 2023Defect Engineering to Achieve Photostable Wide Bandgap Metal Halide Perovskitescitations
- 2023How Photogenerated I2 Induces I‐rich Phase Formation in Lead Mixed Halide Perovskitescitations
- 2023How Halide Alloying Influences the Optoelectronic Quality in Tin-Halide Perovskite Solar Absorberscitations
- 2022Photoluminescence Intensity Enhancement in Tin Halide Perovskitescitations
- 2019Graphite-protected CsPbBr3 perovskite photoanodes functionalised with water oxidation catalyst for oxygen evolution in watercitations
- 2019Inexpensive Metal Free Encapsulation Layers Enable Halide Perovskite Based Photoanodes for Water Splitting
- 2018Screen printed carbon CsPbBr3 solar cells with high open-circuit photovoltagecitations
Places of action
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article
Understanding the Surface Chemistry of Tin Halide Perovskites
Abstract
<jats:title>Abstract</jats:title><jats:p>The role of tin fluoride in defining the complex surface chemistry of tin halide perovskites (THP) is investigated. It is shown that oxygen is found on the surface of tin perovskite thin films even if prepared under a virtually inert environment; however, the presence of SnF<jats:sub>2</jats:sub> strongly affects the chemical nature of the found species. Oxygen primarily binds to tin in the form of SnO<jats:sub>2</jats:sub> only when SnF<jats:sub>2</jats:sub> is added to the precursor solution, while it preferentially binds to carbon and hydrogen in pristine materials. Thanks to the spatial mapping of both the local chemical environment and photoluminescence, it is shown that pristine films have a higher accumulation of iodine at the grain boundaries while the addition of SnF<jats:sub>2</jats:sub> allows for preserving the perovskite phase and reducing chemical and optical heterogeneities. Finally, SnF<jats:sub>2</jats:sub> does not help in avoiding nor slowing down the degradation of the perovskite film when exposed to ambient air and oxidation occurs on the whole THP‐grain surface. These results provide insightful guidance toward understanding oxidation in THPs and elucidate its detrimental effect on the material's properties.</jats:p>