| 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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Martínez-Pastor, Juan P.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (29/29 displayed)
- 2024Origin of discrete donor–acceptor pair transitions in 2D Ruddlesden–Popper perovskitescitations
- 2024Origin of discrete donor–acceptor pair transitions in 2D Ruddlesden–Popper perovskitescitations
- 2024Inkjet-Printed Red-Emitting Flexible LEDs Based on Sustainable Inks of Layered Tin Iodide Perovskitecitations
- 2024Inkjet-printed red-emitting flexible LEDs based on sustainable inks of layered tin iodide perovskitecitations
- 2024Frequency Response of MAPbI3 Perovskites for Photodetection Application
- 2024Spin Coherence and Relaxation Dynamics of Localized Electrons and Holes in FAPbI3 Filmscitations
- 2024Inkjet‐Printed Red‐Emitting Flexible LEDs Based on Sustainable Inks of Layered Tin Iodide Perovskitecitations
- 2023Superradiance Emission and Its Thermal Decoherence in Lead Halide Perovskites Superlatticescitations
- 2023Superradiance Emission and Its Thermal Decoherence in Lead Halide Perovskites Superlatticescitations
- 2023Unusual Spectrally Reproducible and High Q-Factor Random Lasing in Polycrystalline Tin Perovskite Filmscitations
- 2023Lead-Free Halide Perovskite Materials and Optoelectronic Devices: Progress and Prospectivecitations
- 2023Enhanced spontaneous emission of CsPbI3 perovskite nanocrystals using a hyperbolic metamaterial modified by dielectric nanoantennacitations
- 2022Tin perovskite solar cells with >1,300 h of operational stability in N2 through a synergistic chemical engineering approachcitations
- 2022Continuous-Flow Synthesis of Orange Emitting Sn(II)-Doped CsBr Materialscitations
- 2022Suppressing the Formation of High n-Phase and 3D Perovskites in the Fabrication of Ruddlesden-Popper Perovskite Thin Films by Bulky Organic Cation Engineeringcitations
- 2022Directional and Polarized Lasing Action on Pb-free FASnI3 Integrated in Flexible Optical Waveguidecitations
- 2021Homogeneous and inhomogeneous broadening in single perovskite nanocrystals investigated by micro-photoluminescencecitations
- 2021Continuous-Flow Synthesis of Orange Emitting Sn(II)-Doped CsBr Materialscitations
- 2021Purcell Enhancement and Wavelength Shift of Emitted Light by CsPbI3 Perovskite Nanocrystals Coupled to Hyperbolic Metamaterialscitations
- 2021Inhomogeneous Broadening of Photoluminescence Spectra and Kinetics of Nanometer-Thick (Phenethylammonium)2PbI4 Perovskite Thin Films: Implications for Optoelectronicscitations
- 2020Inhibition of light emission from the metastable tetragonal phase at low temperatures in island-like films of lead iodide perovskitescitations
- 2020Interpretation of the photoluminescence decay kinetics in metal halide perovskite nanocrystals and thin polycrystalline filmscitations
- 2020Mechanisms of spontaneous and amplified spontaneous emission in CH3NH3Pb I3 perovskite thin films integrated in an optical waveguidecitations
- 2019Crystalline-Size Dependence of Dual Emission Peak on Hybrid Organic Lead-Iodide Perovskite Films at Low Temperaturescitations
- 2019Outstanding nonlinear optical properties of methylammonium- and Cs-PbX3 (X = Br, I, and Br–I) perovskites: Polycrystalline thin films and nanoparticlescitations
- 2019Outstanding nonlinear optical properties of methylammonium- and Cs-PbX3 (X = Br, I, and Br–I) perovskites: Polycrystalline thin films and nanoparticles
- 2019Structural characterization of bulk and nanoparticle lead halide perovskite thin films by (S)TEM techniquescitations
- 2016Single Step Deposition of an Interacting Layer of Perovskite Matrix with Embedded Quantum Dotscitations
- 2012Plasmon dumping in Ag-nanoparticles/polymer composite for optical detection of amines and thiols vaporscitations
Places of action
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article
Origin of discrete donor–acceptor pair transitions in 2D Ruddlesden–Popper perovskites
Abstract
<jats:p>Two-dimensional (2D) van der Waals nanomaterials have attracted considerable attention for potential use in photonic and light–matter applications at the nanoscale. Thanks to their excitonic properties, 2D perovskites are also promising active materials to be included in devices working at room temperature. In this work, we study the presence of very narrow and spatially localized optical transitions in 2D lead halide perovskites by μ-photoluminescence and time-decay measurements. These discrete optical transitions are characterized by sub-millielectronvolt linewidths (≃120μeV) and long decay times (5–8 ns). X-ray photoemission and density-functional theory calculations have been employed to investigate the chemical origin of electronic states responsible of these transitions. The association of phenethylammonium with methylammonium cations into 2D Ruddlesden–Popper perovskites, (PEA)2(MA)n−1PbnI3n+1, particularly in phases with n≥2, has been identified as a mechanism of donor–acceptor pair (DAP) formation, corresponding to the displacement of lead atoms and their replacement by methylammonium. Ionized DAP recombination is identified as the most likely physical source of the observed discrete optical emission lines. The analysis of the experimental data with a simple model, which evaluates the Coulombic interaction between ionized acceptors and donors, returns a donor in Bohr radius of the order of ≃10 nm. The analysis of the spectral and electronic characteristics of these single donor–acceptor states in 2D perovskites is of particular importance both from the point of view of fundamental research, as well as to be able to link the emission of these states with new optoelectronic applications that require long-range optically controllable interactions.</jats:p>