| People | Locations | Statistics |
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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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Trizio, Luca De
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (11/11 displayed)
- 2024Exogenous Metal Cations in the Synthesis of CsPbBr3 Nanocrystals and Their Interplay with Tertiary Aminescitations
- 2023Light Emission from Low‐Dimensional Pb‐Free Perovskite‐Related Metal Halide Nanocrystalscitations
- 2023Lead‐Free Halide Perovskite Materials and Optoelectronic Devices: Progress and Prospectivecitations
- 2022One Hundred-Nanometer-Sized CsPbBr3/m-SiO2 Composites Prepared via Molten-Salts Synthesis are Optimal Green Phosphors for LCD Display Devicescitations
- 2022Exploiting the Transformative Features of Metal Halides for the Synthesis of CsPbBr3@SiO2 Core-Shell Nanocrystalscitations
- 2020Transforming colloidal Cs4PbBr6 nanocrystals with poly(maleic anhydride-alt-1-octadecene) into stable CsPbBr3 perovskite emitters through intermediate heterostructurescitations
- 2020Developing Lattice Matched ZnMgSe Shells on InZnP Quantum Dots for Phosphor Applicationscitations
- 2020Cs3Cu4In2Cl13 Nanocrystalscitations
- 2019Stable Ligand Coordination at the Surface of Colloidal CsPbBr3 Nanocrystalscitations
- 2018Colloidal Synthesis of Double Perovskite Cs2AgInCl6 and Mn-Doped Cs2AgInCl6 Nanocrystalscitations
- 2018Ab initio structure determination of Cu2- xTe plasmonic nanocrystals by precession-assisted electron diffraction tomography and HAADF-STEM imagingcitations
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article
Exploiting the Transformative Features of Metal Halides for the Synthesis of CsPbBr3@SiO2 Core-Shell Nanocrystals
Abstract
The encapsulation of colloidal lead halide perovskite nanocrystals within silica (SiO<sub>2</sub>)is one of the strategies to protect them from polar solvents and otherexternal factors. Here, we demonstrate the overcoating of CsPbBr<sub>3</sub> perovskite nanocrystals with silica by exploiting the anhydride-induced transformation of Cs<sub>4</sub>PbBr<sub>6</sub> nanocrystals. CsPbBr<sub>3</sub>@SiO<sub>2</sub> core–shell nanocrystals are obtained after (i) a reaction between colloidal Cs<sub>4</sub>PbBr<sub>6</sub> nanocrystals and maleic anhydride in toluene that yields CsPbBr<sub>3</sub> nanocrystals and maleamic acid and (ii) a silica-shell growth around CsPbBr<sub>3</sub> nanocrystals via hydrolysis of added alkoxysilanes. The reaction between Cs<sub>4</sub>PbBr<sub>6</sub>nanocrystals and maleic anhydride is necessary to promote shellformation from alkoxysilanes, as demonstrated in control experiments.The best samples of as-prepared CsPbBr<sub>3</sub>@SiO<sub>2</sub> nanocrystals consist of ∼10 nm single-crystal CsPbBr<sub>3</sub>cores surrounded by ∼5–7 nm amorphous silica shell. Despite theircore–shell structure, such nanostructures are poor emitters and degradewithin minutes of exposure to ethanol. The photoluminescence intensityof the core–shell nanocrystals is improved by the treatment with asolution of PbBr<sub>2</sub> and ligands, and their stability in ethanolis extended to several days after applying an additional silica growthstep. Overall, the investigated approach outlines a strategy for makingcolloidal core–shell nanocrystals utilizing the transformative chemistryof metal halides and reveals interesting insights regarding theconditions required for CsPbBr<sub>3</sub>@SiO<sub>2</sub> nanocrystal formation.