| 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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Grätzel, Michael
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (38/38 displayed)
- 2024Helical interfacial modulation for perovskite photovoltaicscitations
- 2024High‐Performance Perovskite Solar Cells with Zwitterion‐Capped‐ZnO Quantum Dots as Electron Transport Layer and <scp>NH<sub>4</sub></scp>X (X = F, Cl, Br) Assisted Interfacial Engineeringcitations
- 2023Influence of different surface conditions on mechanical properties during ultrasonic welding of aluminum wire strands and copper terminalscitations
- 2023Champion Device Architectures for Low-Cost and Stable Single-Junction Perovskite Solar Cells.
- 2023Champion Device Architectures for Low-Cost and Stable Single-Junction Perovskite Solar Cells
- 2022A systematic analysis of maximum tolerable tool wear in friction stir weldingcitations
- 2022Crystal‐size‐induced band gap tuning in perovskite filmscitations
- 2020A novel approach for the detection of geometric- and weight-related FSW tool wear using stripe light projectioncitations
- 2020Interfacial and bulk properties of hole transporting materials in perovskite solar cells: spiro-MeTAD versus spiro-OMeTADcitations
- 2020Influence of different Ni coatings on the long-term behavior of ultrasonic welded EN AW 1370 cable/EN CW 004A arrestor dissimilar jointscitations
- 2020Fatigue behavior of conventional and stationary shoulder friction stir welded EN AW-5754 aluminum alloy using load increase methodcitations
- 2020Effect of corrosion and surface finishing on fatigue behavior of friction stir welded EN AW-5754 aluminum alloy using various tool configurationscitations
- 2020An experimental study on lap joining of multiple sheets of aluminium alloy (AA 5754) using friction stir spot weldingcitations
- 2020An experimental study on lap joining of multiple sheets of aluminium alloy (AA 5754) using friction stir spot weldingcitations
- 2019Multifunctional Molecular Modulation for Efficient and Stable Hybrid Perovskite Solar Cellscitations
- 2019Atomic-level passivation mechanism of ammonium salts enabling highly efficient perovskite solar cells.
- 2019Charge extraction via graded doping of hole transport layers gives highly luminescent and stable metal halide perovskite devices.
- 2019Indirect tail states formation by thermal-induced polar fluctuations in halide perovskitescitations
- 2019Indirect tail states formation by thermal-induced polar fluctuations in halide perovskitescitations
- 2018Perovskite Solar Cells: From the Atomic Level to Film Quality and Device Performancecitations
- 2018Dedoping of Lead Halide Perovskites Incorporating Monovalent Cations.
- 2017Stabilizing organic photocathodes by low-temperature atomic layer deposition of TiO<sub>2</sub>citations
- 2017The effect of illumination on the formation of metal halide perovskite filmscitations
- 2017Giant five-photon absorption from multidimensional core-shell halide perovskite colloidal nanocrystalscitations
- 2016Carbon nanotube-based hybrid hole-transporting material and selective contact for high efficiency perovskite solar cellscitations
- 2016Not all that glitters is gold: metal-migration-induced degradation in perovskite solar cellscitations
- 2015Targeting Ideal Dual-Absorber Tandem Water Splitting Using Perovskite Photovoltaics and CuInxGa1-xSe2Photocathodescitations
- 2015Targeting ideal dual-absorber tandem water splitting using perovskite photovoltaics and CuIn x Ga 1-x Se 2 photocathodescitations
- 2015High-efficiency polycrystalline thin film tandem solar cellscitations
- 2015Transparent Cuprous Oxide Photocathode Enabling a Stacked Tandem Cell for Unbiased Water Splittingcitations
- 2015Understanding the Role of Underlayers and Overlayers in Thin Film Hematite Photoanodescitations
- 2014Understanding the role of underlayers and overlayers in thin film hematite photoanodescitations
- 2014Back electron–hole recombination in hematite photoanodes for water splittingcitations
- 2014High-surface-area porous platinum electrodes for enhanced charge transfercitations
- 2013Between photocatalysis and photosynthesis: synchrotron spectroscopy methods on molecules and materials for solar hydrogen generationcitations
- 2012A silica sol-gel design strategy for nanostructured metallic materialscitations
- 2012Nanocomposites containing neutral blue emitting cyclometalated iridium(III) emitters for oxygen sensingcitations
- 2012Nanocomposites containing neutral blue emitting cyclometalated iridium(III) emitters for oxygen sensingcitations
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