| 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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Divitini, Giorgio
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (37/37 displayed)
- 2024Decoupled High‐Mobility Graphene on Cu(111)/Sapphire via Chemical Vapor Depositioncitations
- 2024Exogenous Metal Cations in the Synthesis of CsPbBr3 Nanocrystals and Their Interplay with Tertiary Aminescitations
- 2024Exogenous Metal Cations in the Synthesis of CsPbBr3 Nanocrystals and Their Interplay with Tertiary Aminescitations
- 2024Heterostructures via a Solution‐Based Anion Exchange in Microcrystalline 2D Layered Metal‐Halide Perovskitescitations
- 2024Dry synthesis of bi-layer nanoporous metal films as plasmonic metamaterialcitations
- 2023Photogeneration of spin quintet triplet–triplet excitations in DNA-assembled pentacene stackscitations
- 2023Photogeneration of Spin Quintet Triplet–Triplet Excitations in DNA-Assembled Pentacene Stacks
- 2023Photogeneration of Spin Quintet Triplet-Triplet Excitations in DNA-Assembled Pentacene Stacks.
- 2022One Hundred-Nanometer-Sized CsPbBr3/m-SiO2 Composites Prepared via Molten-Salts Synthesis are Optimal Green Phosphors for LCD Display Devicescitations
- 2022Sol-gel processing of a covalent organic framework for the generation of hierarchically porous monolithic adsorbentscitations
- 2022Sodium Diffuses from Glass Substrates through P1 Lines and Passivates Defects in Perovskite Solar Modules
- 2021Beyond 17% stable perovskite solar module via polaron arrangement of tuned polymeric hole transport layercitations
- 2021Using pulsed mode scanning electron microscopy for cathodoluminescence studies on hybrid perovskite films
- 2021Using pulsed mode scanning electron microscopy for cathodoluminescence studies on hybrid perovskite films
- 2021Stepwise collapse of a giant pore metal-organic frameworkcitations
- 2021Mixed hierarchical local structure in a disordered metal–organic frameworkcitations
- 2021Nanometric Chemical Analysis of Beam-Sensitive Materials: A Case Study of STEM-EDX on Perovskite Solar Cells.
- 2020Colloidal Synthesis and Optical Properties of Perovskite-Inspired Cesium Zirconium Halide Nanocrystals.
- 2020Performance-limiting nanoscale trap clusters at grain junctions in halide perovskites.
- 2020Pair suppression caused by mosaic-twist defects in superconducting Sr2RuO4 thin-films prepared using pulsed laser depositioncitations
- 2020Ion Migration‐Induced Amorphization and Phase Segregation as a Degradation Mechanism in Planar Perovskite Solar Cells
- 2019High throughput production of single-wall carbon nanotube fibres independent of sulfur-source.
- 2019High throughput production of single-wall carbon nanotube fibres independent of sulfur-source.
- 2018Maximizing and stabilizing luminescence from halide perovskites with potassium passivationcitations
- 2018Maximizing and stabilizing luminescence from halide perovskites with potassium passivation
- 2018Potassium- and Rubidium-Passivated Alloyed Perovskite Films: Optoelectronic Properties and Moisture Stability.
- 2018Core-Shell Electrospun Polycrystalline ZnO Nanofibers for Ultra-Sensitive NO2 Gas Sensing.
- 2018Dedoping of Lead Halide Perovskites Incorporating Monovalent Cations.
- 2018Exciton-Phonon Interactions Govern Charge-Transfer-State Dynamics in CdSe/CdTe Two-Dimensional Colloidal Heterostructures.
- 2017Tuning the properties of a black TiO<sub>2</sub>-Ag visible light photocatalyst produced by rapid one-pot chemical reductioncitations
- 2017Tuning the properties of a black TiO 2 -Ag visible light photocatalyst produced by rapid one-pot chemical reduction
- 2017Chemical vapour deposition of freestanding sub-60 nm graphene gyroidscitations
- 2016In Situ Heat-Induced Replacement of GaAs Nanowires by Au.
- 2015Interface and Composition Analysis on Perovskite Solar Cells.
- 2015Interface and Composition Analysis on Perovskite Solar Cellscitations
- 2015Local Versus Long-Range Diffusion Effects of Photoexcited States on Radiative Recombination in Organic-Inorganic Lead Halide Perovskites.
- 2011Flexible and biocompatible microelectrode arrays fabricated by supersonic cluster beam deposition on SU-8citations
Places of action
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article
Dedoping of Lead Halide Perovskites Incorporating Monovalent Cations.
Abstract
We report significant improvements in the optoelectronic properties of lead halide perovskites with the addition of monovalent ions with ionic radii close to Pb2+. We investigate the chemical distribution and electronic structure of solution processed CH3NH3PbI3 perovskite structures containing Na+, Cu+, and Ag+, which are lower valence metal ions than Pb2+ but have similar ionic radii. Synchrotron X-ray diffraction reveals a pronounced shift in the main perovskite peaks for the monovalent cation-based films, suggesting incorporation of these cations into the perovskite lattice as well as a preferential crystal growth in Ag+ containing perovskite structures. Furthermore, the synchrotron X-ray photoelectron measurements show a significant change in the valence band position for Cu- and Ag-doped films, although the perovskite bandgap remains the same, indicating a shift in the Fermi level position toward the middle of the bandgap. Such a shift infers that incorporation of these monovalent cations dedope the n-type perovskite films when formed without added cations. This dedoping effect leads to cleaner bandgaps as reflected by the lower energetic disorder in the monovalent cation-doped perovskite thin films as compared to pristine films. We also find that in contrast to Ag+ and Cu+, Na+ locates mainly at the grain boundaries and surfaces. Our theoretical calculations confirm the observed shifts in X-ray diffraction peaks and Fermi level as well as absence of intrabandgap states upon energetically favorable doping of perovskite lattice by the monovalent cations. We also model a significant change in the local structure, chemical bonding of metal-halide, and the electronic structure in the doped perovskites. In summary, our work highlights the local chemistry and influence of monovalent cation dopants on crystallization and the electronic structure in the doped perovskite thin films. ; Cambridge Materails Limited, Nava Technology Limited