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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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Tekelenburg, Eelco K.
University of Groningen
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (14/14 displayed)
- 2024Cation Influence on Hot-Carrier Relaxation in Tin Triiodide Perovskite Thin Filmscitations
- 2024Quasi-2D Lead–Tin Perovskite Memory Devices Fabricated by Blade Coatingcitations
- 2024Mechanism of Hot-Carrier Photoluminescence in Sn-Based Perovskitescitations
- 2024Metal-Solvent Complex Formation at the Surface of InP Colloidal Quantum Dotscitations
- 2023The Origin of Broad Emission in ⟨100⟩ Two-Dimensional Perovskites: Extrinsic vs Intrinsic Processes.
- 2023The Origin of Broad Emission in ⟨100⟩ Two-Dimensional Perovskites: Extrinsic vs Intrinsic Processes.
- 2023Unraveling the Broadband Emission in Mixed Tin-Lead Layered Perovskitescitations
- 2023Unraveling the Broadband Emission in Mixed Tin-Lead Layered Perovskitescitations
- 2023Impact of two diammonium cations on the structure and photophysics of layered Sn-based perovskitescitations
- 2022The Origin of Broad Emission in ⟨100⟩ Two-Dimensional Perovskites: Extrinsic vs Intrinsic Processes.
- 2022The Origin of Broad Emission in ⟨100⟩ Two-Dimensional Perovskites: Extrinsic vs Intrinsic Processescitations
- 2022The Origin of Broad Emission in ⟨100»Two-Dimensional Perovskites:Extrinsic vs Intrinsic Processescitations
- 2022The Origin of Broad Emission in â ¨100»Two-Dimensional Perovskites: Extrinsic vs Intrinsic Processes
- 2020Extrinsic nature of the broad photoluminescence in lead iodide-based Ruddlesden-Popper perovskitescitations
Places of action
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article
Metal-Solvent Complex Formation at the Surface of InP Colloidal Quantum Dots
Abstract
The surface chemistry of colloidal semiconductor nanocrystals (QDs) profoundly influences their physical and chemical attributes. The insulating organic shell ensuring colloidal stability impedes charge transfer, thus limiting optoelectronic applications. Exchanging these ligands with shorter inorganic ones enhances charge mobility and stability, which is pivotal for using these materials as active layers for LEDs, photodetectors, and transistors. Among those, InP QDs also serve as a model for surface chemistry investigations. This study focuses on group III metal salts as inorganic ligands for InP QDs. We explored the ligand exchange mechanism when metal halide, nitrate, and perchlorate salts of group III (Al, In Ga), common Lewis acids, are used as ligands for the conductive inks. Moreover, we compared the exchange mechanism for two starting model systems: InP QDs capped with myristate and oleylamine as X- and L-type native organic ligands, respectively. We found that all metal halide, nitrate, and perchlorate salts dissolved in polar solvents (such as n-methylformamide, dimethylformamide, dimethyl sulfoxide, H 2 O) with various polarity formed metal-solvent complex cations [M(Solvent) 6 ] 3+ (e.g., [Al(MFA) 6 ] 3+ , [Ga(MFA) 6 ] 3+ , [In(MFA) 6 ] 3+ ), which passivated the surface of InP QDs after the removal of the initial organic ligand. All metal halide capped InP/[M(Solvent) 6 ] 3+ QDs show excellent colloidal stability in polar solvents with high dielectric constant even after 6 months in concentrations up to 74 mg/mL. Our findings demonstrate the dominance of dissociation-complexation mechanisms in polar solvents, ensuring colloidal stability. This comprehensive understanding of InP QD surface chemistry paves the way for exploring more complex QD systems such as InAs and InSb QDs.