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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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Galkowski, Krzysztof
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (14/14 displayed)
- 2024Polaronic Mass Enhancement and Polaronic Excitons in Metal Halide Perovskitescitations
- 2023Strongly Confined CsPbBr3 Quantum Dots as Quantum Emitters and Building Blocks for Rhombic Superlatticescitations
- 2023Strongly Confined CsPbBr3 Quantum Dots as Quantum Emitters and Building Blocks for Rhombic Superlattices.
- 2023Strongly confined CsPbBr 3 quantum dots as quantum emitters and building blocks for rhombic superlatticescitations
- 2022Local nanoscale phase impurities are degradation sites in halide perovskitescitations
- 2022Local nanoscale phase impurities are degradation sites in halide perovskites.
- 2021Proton radiation hardness of perovskite tandem photovoltaics
- 2021Local Energy Landscape Drives Long-Range Exciton Diffusion in Two-Dimensional Halide Perovskite Semiconductors.
- 2020Proton Radiation Hardness of Perovskite Tandem Photovoltaicscitations
- 2017Impact of microstructure on the electron-hole interaction in lead halide perovskitescitations
- 2017Magneto-optical and microscopic properties of organo lead halide perovskites ; Propriétés magnéto-optiques et microscopiques de perovskites organique-halogénure de plomb
- 2017The Impact of Phase Retention on the Structural and Optoelectronic Properties of Metal Halide Perovskites.
- 2016The Impact of Phase Retention on the Structural and Optoelectronic Properties of Metal Halide Perovskitescitations
- 2016The Impact of Phase Retention on the Structural and Optoelectronic Properties of Metal Halide Perovskites.
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article
Local Energy Landscape Drives Long-Range Exciton Diffusion in Two-Dimensional Halide Perovskite Semiconductors.
Abstract
Halide perovskites are versatile semiconductors with applications including photovoltaics and light-emitting devices, having modular optoelectronic properties realizable through composition and dimensionality tuning. Layered Ruddlesden-Popper perovskites are particularly interesting due to their unique 2D character and charge carrier dynamics. However, long-range energy transport through exciton diffusion in these materials is not understood or realized. Here, local time-resolved luminescence mapping techniques are employed to visualize exciton transport in exfoliated flakes of the BA2MAn-1PbnI3n+1 perovskite family. Two distinct transport regimes are uncovered, depending on the temperature range. Above 100 K, diffusion is mediated by thermally activated hopping processes between localized states. At lower temperatures, a nonuniform energy landscape emerges in which transport is dominated by downhill energy transfer to lower-energy states, leading to long-range transport over hundreds of nanometers. Efficient, long-range, and switchable downhill transfer offers exciting possibilities for controlled directional long-range transport in these 2D materials for new applications. ; The authors acknowledge the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation program (HYPERION, Grant Agreement Number 756962). SDS acknowledges funding from the Royal Society and Tata Group (UF150033). GD acknowledges the Royal Society for funding through a Newton International Fellowship. GD and SDS acknowledge the UK Engineering and Physical Sciences Research Council (EPSRC) under grant reference EP/R023980/1. A.B. acknowledges a Robert Gardiner Scholarship and funding from Christ’s College, Cambridge. K.G. acknowledges support from the Polish Ministry of Science and Higher Education within the Mobilnosc Plus program (GrantNo.1603/MOB/V/2017/0). The authors thank Niall Goulding and Rachel Bothwell for valuable discussions.