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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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Anaya, Miguel
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (20/20 displayed)
- 2024Composition dictates octahedral tilt and photostability in halide perovskites
- 2024Composition dictates octahedral tilt and photostability in halide perovskitescitations
- 2024Multimodal operando microscopy reveals that interfacial chemistry and nanoscale performance disorder dictate perovskite solar cell stability
- 2024Multifold Enhanced Photon Upconversion in a Composite Annihilator System Sensitized by Perovskite Nanocrystals.
- 2023Surfactant-Dependent Bulk Scale Mechanochemical Synthesis of CsPbBr3 Nanocrystals for Plastic Scintillator-Based X-ray Imagingcitations
- 2023Surfactant-Dependent Bulk Scale Mechanochemical Synthesis of CsPbBr3 Nanocrystals for Plastic Scintillator-Based X-ray Imaging.
- 2022An open-access database and analysis tool for perovskite solar cells based on the FAIR data principlescitations
- 2022Local nanoscale phase impurities are degradation sites in halide perovskitescitations
- 2022Local nanoscale phase impurities are degradation sites in halide perovskites.
- 2022Stabilized tilted-octahedra halide perovskites inhibit local formation of performance-limiting phases.
- 2021An open-access database and analysis tool for perovskite solar cells based on the FAIR data principlescitations
- 2021Halide perovskites scintillators: unique promise and current limitations.
- 2021Unraveling the varied nature and roles of defects in hybrid halide perovskites with time-resolved photoemission electron microscopycitations
- 2021Nanoscale chemical heterogeneity dominates the optoelectronic response of alloyed perovskite solar cellscitations
- 2021Stabilized tilted-octahedra halide perovskites inhibit local formation of performance-limiting phasescitations
- 2021Unraveling the varied nature and roles of defects in hybrid halide perovskites with time-resolved photoemission electron microscopy.
- 2020Performance-limiting nanoscale trap clusters at grain junctions in halide perovskites.
- 2020Multi-source vacuum deposition of methylammonium-free perovskite solar cells
- 2019Identifying and Reducing Interfacial Losses to Enhance Color-Pure Electroluminescence in Blue-Emitting Perovskite Nanoplatelet Light-Emitting Diodes.
- 2015Highly Efficient Perovskite Solar Cells with Tunable Structural Colorcitations
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article
Multimodal operando microscopy reveals that interfacial chemistry and nanoscale performance disorder dictate perovskite solar cell stability
Abstract
Next-generation low-cost semiconductors such as halide perovskites exhibit optoelectronic properties dominated by nanoscale variations in their structure, composition and photophysics. While microscopy provides a proxy for ultimate device function, past works have focused on neat thin-films on insulating substrates, missing crucial information about charge extraction losses and recombination losses introduced by transport layers. Here we use a multimodal operando microscopy toolkit to measure nanoscale current-voltage curves, recombination losses and chemical composition in an array of state-of-the-art perovskite solar cells before and after extended operational stress. We apply this toolkit to the same scan areas before and after extended operation to reveal that devices with the highest performance have the lowest initial performance spatial heterogeneity - a crucial link that is missed in conventional microscopy. We find that subtle compositional engineering of the perovskite has surprising effects on local disorder and resilience to operational stress. Minimising variations in local efficiency, rather than compositional disorder, is predictive of improved performance and stability. Modulating the interfaces with different contact layers or passivation treatments can increase initial performance but can also lead to dramatic nanoscale, interface-dominated degradation even in the presence of local performance homogeneity, inducing spatially varying transport, recombination, and electrical losses. These operando measurements of full devices act as screenable diagnostic tools, uniquely unveiling the microscopic mechanistic origins of device performance losses and degradation in an array of halide perovskite devices and treatments. This information in turn reveals guidelines for future improvements to both performance and stability.