| 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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Chernyshov, Dmitry
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (23/23 displayed)
- 2024Magnetostructural Coupling at the Néel Point in YNiO3 Single Crystals
- 2024Magnetostructural coupling at the Néel point in YNiO 3 single crystals
- 2024Magnetostructural Coupling at the Néel Point in YNiO $_3$ Single Crystals
- 2024Unveiling surface chemistry of ultrafast-sintered LLZO solid-state electrolytes for high-performance Li-garnet solid-state batteries
- 2024Ultrafast sintering of dense Li 7 La 3 Zr 2 O 12 membranes for Li metal All‐solid‐state batteriescitations
- 2024Alleviating nanostructural phase impurities enhances the optoelectronic properties, device performance and stability of cesium-formamidinium metal–halide perovskitescitations
- 2024Alleviating nanostructural phase impurities enhances the optoelectronic properties, device performance and stability of cesium-formamidinium metal–halide perovskitescitations
- 2023How to GIWAXS: Grazing Incidence Wide Angle X-Ray Scattering Applied to Metal Halide Perovskite Thin Filmscitations
- 2023Pyrochlore‐type iron hydroxy fluorides as low‐cost lithium‐ion cathode materials for stationary energy storagecitations
- 2023How to GIWAXS: Grazing Incidence Wide Angle X‐Ray Scattering Applied to Metal Halide Perovskite Thin Filmscitations
- 2022Hydrogen induced structural phase transformation in ScNiSn-based intermetallic hydride characterized by experimental and computational studiescitations
- 2022Hydrogen induced structural phase transformation in ScNiSn-based intermetallic hydride characterized by experimental and computational studies ; ENEngelskEnglishHydrogen induced structural phase transformation in ScNiSn-based intermetallic hydride characterized by experimental and computational studiescitations
- 2022An embedded interfacial network stabilizes inorganic CsPbI3 perovskite thin filmscitations
- 2022An embedded interfacial network stabilizes inorganic CsPbI3 perovskite thin filmscitations
- 2020Metal-organic magnets with large coercivity and ordering temperatures up to 242°Ccitations
- 2020Mechanisms for texture in BaTiO(3)thin films from aqueous chemical solution depositioncitations
- 2020Hidden diversity of vacancy networks in Prussian blue analoguescitations
- 2019Single-Step Synthesis of Dual Phase Bright Blue-Green Emitting Lead Halide Perovskite Nanocrystal Thin Filmscitations
- 2017Synthesis, Structure, and Thermoelectric Properties of α-Zn3Sb2 and Comparison to β-Zn13Sb10citations
- 2016High-Pressure Study of Mn(BH 4 ) 2 Reveals a Stable Polymorph with High Hydrogen Densitycitations
- 2013Experimental evidence of orbital order in $α-B_{12} and γ-B_{28}$ polymorphs of elemental boroncitations
- 2011Electron-Deficient and Polycenter Bonds in the High-Pressure gamma-B-28 Phase of Boroncitations
- 2010Pressure-induced isostructural phase transformation in gamma-B(28)citations
Places of action
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article
Alleviating nanostructural phase impurities enhances the optoelectronic properties, device performance and stability of cesium-formamidinium metal–halide perovskites
Abstract
The technique of alloying FA + with Cs + is often used to promote structural stabilization of the desirable α-FAPbI 3 phase in halide perovskite devices. However, the precise mechanisms by which these alloying approaches improve the optoelectronic quality and enhance the stability have remained elusive. In this study, we advance that understanding by investigating the effect of cationic alloying in Cs x FA 1−x PbI 3 perovskite thin-films and solar-cell devices. Selected-area electron diffraction patterns combined with microwave conductivity measurements reveal that fine Cs + tuning (Cs 0.15 FA 0.85 PbI 3 ) leads to a minimization of stacking faults and an increase in the photoconductivity of the perovskite films. Ultra-sensitive external quantum efficiency, kelvin-probe force microscopy and photoluminescence quantum yield measurements demonstrate similar Urbach energy values, comparable surface potential fluctuations and marginal impact on radiative emission yields, respectively, irrespective of Cs content. Despite this, these nanoscopic defects appear to have a detrimental impact on inter-grains’/domains’ carrier transport, as evidenced by conductive-atomic force microscopy and corroborated by drastically reduced solar cell performance. Importantly, encapsulated Cs 0.15 FA 0.85 PbI 3 devices show robust operational stability retaining 85% of the initial steady-state power conversion efficiency for 1400 hours under continuous 1 sun illumination at 35 °C, in open-circuit conditions. Our findings provide nuance to the famous defect tolerance of halide perovskites while providing solid evidence about the detrimental impact of these subtle structural imperfections on the long-term operational stability.