| 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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Dyksik, Mateusz
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (9/9 displayed)
- 2024Bright Excitonic Fine Structure in Metal-Halide Perovskites: From Two-Dimensional to Bulkcitations
- 2024Exciton Fine Structure in 2D Perovskites: The Out-of-Plane Excitonic Statecitations
- 2024Polaronic Mass Enhancement and Polaronic Excitons in Metal Halide Perovskitescitations
- 2021Photophysics of Two-Dimensional Perovskites—Learning from Metal Halide Substitutioncitations
- 2021Photophysics of Two-Dimensional Perovskites—Learning from Metal Halide Substitution
- 2021Brightening of dark excitons in 2D perovskitescitations
- 2021Manganese doping for enhanced magnetic brightening and circular polarization control of dark excitons in paramagnetic layered hybrid metal-halide perovskitescitations
- 2021Manganese doping for enhanced magnetic brightening and circular polarization control of dark excitons in paramagnetic layered hybrid metal-halide perovskites.
- 2020Broad Tunability of Carrier Effective Masses in Two-Dimensional Halide Perovskitescitations
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article
Brightening of dark excitons in 2D perovskites
Abstract
Optically inactive dark exciton states play an important role in light emission processes in semiconductors because they provide an efficient nonradiative recombination channel. Understanding the exciton fine structure in materials with potential applications in light-emitting devices is therefore critical. Here, we investigate the exciton fine structure in the family of two-dimensional (2D) perovskites (PEA) 2 SnI 4 , (PEA) 2 PbI 4 , and (PEA) 2 PbBr 4 . In-plane magnetic field mixes the bright and dark exciton states, brightening the otherwise optically inactive dark exciton. The bright-dark splitting increases with increasing exciton binding energy. Hot photoluminescence is observed, indicative of a non-Boltzmann distribution of the bright-dark exciton populations. We attribute this to the phonon bottleneck, which results from the weak exciton-acoustic phonon coupling in soft 2D perovskites. Hot photoluminescence is responsible for the strong emission observed in these materials, despite the substantial bright-dark exciton splitting.