| 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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Protesescu, Loredana
University of Groningen
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (26/26 displayed)
- 2024Structural and optical control through anion and cation exchange processes for Sn-halide perovskite nanostructurescitations
- 2024Understanding the Surface Chemistry of SnO 2 Nanoparticles for High Performance and Stable Organic Solar Cellscitations
- 2024Blade-coated perovskite nanoplatelet polymer composites for sky-blue light-emitting diodescitations
- 2024Growth mechanism of oleylammonium-based tin and lead bromide perovskite nanostructurescitations
- 2024Air-Stable Thin Films of Tin Halide Perovskite Nanocrystals by Polymers and Al 2 O 3 Encapsulationcitations
- 2024Understanding the Surface Chemistry of SnO2 Nanoparticles for High Performance and Stable Organic Solar Cellscitations
- 2024Metal-Solvent Complex Formation at the Surface of InP Colloidal Quantum Dotscitations
- 2023Nickel Boride (Ni x B) Nanocrystals:From Solid-State Synthesis to Highly Colloidally Stable Inkscitations
- 2023Nickel Boride (NixB) Nanocrystalscitations
- 2020Exciton-ligand interactions in PbS quantum dots capped with metal chalcogenidescitations
- 2018Size-dependent fault-driven relaxation and faceting in zincblende CdSe colloidal quantum dotscitations
- 2018Exploration of near-infrared-emissive colloidal multinary lead halide perovskite nanocrystals using an automated microfluidic platformcitations
- 2017Long-lived hot carriers in formamidinium lead iodide nanocrystalscitations
- 2017Properties and potential optoelectronic applications of lead halide perovskite nanocrystalscitations
- 2016Single cesium lead halide perovskite nanocrystals at low temperature: fast single-photon emission, reduced blinking, and exciton fine structurecitations
- 2016Synthesis of cesium lead halide perovskite nanocrystals in a droplet-based microfluidic platform: fast parametric space mappingcitations
- 2016Harnessing defect-tolerance at the nanoscale: highly luminescent lead halide perovskite nanocrystals in mesoporous silica matrixescitations
- 2015Random Lasing with Systematic Threshold Behavior in Films of CdSe/CdS Core/Thick-Shell Colloidal Quantum Dotscitations
- 2015Nanocrystals of cesium lead halide perovskites (CsPbX 3 , X = Cl, Br, and I): novel optoelectronic materials showing bright emission with wide color gamutcitations
- 2015Low-threshold amplified spontaneous emission and lasing from colloidal nanocrystals of caesium lead halide perovskitescitations
- 2015Fast anion-exchange in highly luminescent nanocrystals of cesium lead halide perovskites (CsPbX 3 , X = Cl, Br, I)citations
- 2015Opto-electronics of PbS quantum dot and narrow bandgap polymer blendscitations
- 2015Low-threshold amplified spontaneous emission and lasing from colloidal nanocrystals of caesium lead halide perovskites (vol 6, 8056, 2015)citations
- 2015Nanocrystals of cesium lead halide perovskites (CsPbX3, X=Cl, Br, and I):novel optoelectronic materials showing bright emission with wide color gamutcitations
- 2014Surface functionalization of semiconductor and oxide nanocrystals with small inorganic oxoanions (PO 4 3– , MoO 4 2– ) and polyoxometalate ligandscitations
- 2014High Infrared Photoconductivity in Films of Arsenic-Sulfide-Encapsulated Lead-Sulfide Nanocrystalscitations
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.