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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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Marongiu, Daniela
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (27/27 displayed)
- 2024Dynamic Disorder in Monolayer and Multilayer 2D Ruddlesden–Popper Lead Iodide Perovskites: Evidence from Solid-State Nuclear Magnetic Resonance and Ultrafast Optical Spectroscopy
- 2024Recent Advances in Perovskite Single-Crystal Thin Film Optoelectronic Devicescitations
- 2024Photoconduction in 2D Single‐Crystal Hybrid Perovskitescitations
- 2023Stabilization of Inorganic Perovskite Solar Cells with a 2D Dion–Jacobson Passivating Layercitations
- 2023Stabilisation of Inorganic Perovskite Solar Cells with A 2d Dion-Jacobson Passivating Layercitations
- 2023Stabilisation of Inorganic Perovskite Solar Cells with A 2d Dion-Jacobson Passivating Layercitations
- 2023Exciton dissociation in 2D layered metal-halide perovskitescitations
- 2022White light emission with unity efficiency from Cs 2 Na 1−x Ag x In 1−y Bi y Cl 6 double perovskites:the role of bismuth and silvercitations
- 2022Direct measurement of radiative decay rates in metal halide perovskites†citations
- 2022White light emission with unity efficiency from Cs2Na1−xAgxIn1−yBiyCl6 double perovskitescitations
- 2022Direct measurement of radiative decay rates in metal halide perovskitescitations
- 2021A new photophysics for 2D and 3D lead halide perovskites: Polaron plasma in equilibrium with bright excitons
- 2021Combined Experimental/Theoretical Study on the Luminescent Properties of Homoleptic/Heteroleptic Erbium(III) Anilate-Based 2D Coordination Polymerscitations
- 2021Long-lived electrets and lack of ferroelectricity in methylammonium lead bromide CH3NH3PbBr3 ferroelastic single crystalscitations
- 2019Photoluminescence Emission Induced by Localized States in Halide Passivated Colloidal Two-Dimensional WS2 Nanoflakes
- 2019Bifacial Diffuse Absorptance of Semitransparent Microstructured Perovskite Solar Cellscitations
- 2018Perovskite Excitonics:Primary Exciton Creation and Crossover from Free Carriers to a Secondary Exciton Phasecitations
- 2018Direct or indirect bandgap in hybrid lead halide perovskites?citations
- 2018Perovskite Excitonics: Primary Exciton Creation and Crossover from Free Carriers to a Secondary Exciton Phasecitations
- 2018Novel physical vapor deposition approach to hybrid perovskites: Growth of MAPbI3 thin films by RF-magnetron sputteringcitations
- 2017Self-Assembled Lead Halide Perovskite Nanocrystals in a Perovskite Matrixcitations
- 2016Paving the way for solution- processable perovskite laserscitations
- 2015Absorption f-sum rule for the exciton binding energy in methylammonium lead halide perovskitescitations
- 2014Colloidal Bi2S3 nanocrystals: Quantum size effects and midgap statescitations
- 2014Correlated electron-hole plasma in organometal perovskitescitations
- 2012Pore-confined synthesis of mesoporous nanocrystalline La–Ce phosphate films for sensing applicationscitations
- 2010An Alternative Sol–gel Route for the Preparation of Thin Films in CeO2–TiO2 Binary Systemcitations
Places of action
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article
White light emission with unity efficiency from Cs2Na1−xAgxIn1−yBiyCl6 double perovskites
Abstract
<p>Double perovskites Cs<sub>2</sub>Na<sub>1−x</sub>Ag<sub>x</sub>In<sub>1−y</sub>Bi<sub>y</sub>Cl<sub>6</sub> can emit warm white light with almost unity quantum efficiency and are thus among the most promising materials for solid-state lighting. The emission spectrum is reproducible and the materials themselves are robust against degradation, as well as fabricated from earth-abundant, non-toxic precursors. The emission efficiency is however sensitive to the materials composition, with small variations modifying the photoluminescence quantum yield by more than an order of magnitude. We provide here a comprehensive, systematic study of the optical properties as a function of composition and identify the microscopic mechanism linking the presence of Bi and Ag to the high emission quantum yield. A 0.1% minimum fraction of Bi and Ag is found to trigger efficient emission of warm white light. Ag alloying is fundamental to obtain high emission yields. Continuous-wave spectroscopy measurements are complemented with ab initio computation of the electronic band structure in demonstrating that Bi strengthens optical absorption at the band gap edge of the double perovskites. In addition, it is found by combining time-resolved photoluminescence and transient absorption spectroscopy that Ag and Bi promote the formation of bright (radiative) self-trapped excitons, while inhibiting exciton relaxation into long-lived dark states.</p>