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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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Adjokatse, Sampson
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (21/21 displayed)
- 2023Unraveling the Broadband Emission in Mixed Tin-Lead Layered Perovskitescitations
- 2023Unraveling the Broadband Emission in Mixed Tin-Lead Layered Perovskitescitations
- 2021Photophysics of Two-Dimensional Perovskites—Learning from Metal Halide Substitutioncitations
- 2020Broad Tunability of Carrier Effective Masses in Two-Dimensional Halide Perovskitescitations
- 2020Unraveling the Microstructure of Layered Metal Halide Perovskite Filmscitations
- 2020Unraveling the Microstructure of Layered Metal Halide Perovskite Filmscitations
- 2020Stable cesium formamidinium lead halide perovskites: a comparison of photophysics and phase purity in thin films and single crystalscitations
- 2020Influence of morphology on photoluminescence properties of methylammonium lead tribromide filmscitations
- 2019Stable Cesium Formamidinium Lead Halide Perovskitescitations
- 2019Mechanism of surface passivation of methylammonium lead tribromide single crystals by benzylaminecitations
- 2019Mechanism of surface passivation of methylammonium lead tribromide single crystals by benzylaminecitations
- 2019Scalable fabrication of high-quality crystalline and stable FAPbI(3) thin films by combining doctor-blade coating and the cation exchange reactioncitations
- 2019Scalable fabrication of high-quality crystalline and stable FAPbI(3) thin films by combining doctor-blade coating and the cation exchange reactioncitations
- 2019The Impact of Stoichiometry on the Photophysical Properties of Ruddlesden-Popper Perovskitescitations
- 2019Stable Cesium Formamidinium Lead Halide Perovskites:A Comparison of Photophysics and Phase Purity in Thin Films and Single Crystalscitations
- 2019Effects of strontium doping on the morphological, structural, and photophysical properties of FASnI(3) perovskite thin filmscitations
- 2017Broadly tunable metal halide perovskites for solid-state light-emission applicationscitations
- 2016N-type polymers as electron extraction layers in hybrid perovskite solar cells with improved ambient stabilitycitations
- 2015Photophysics of Organic-Inorganic Hybrid Lead Iodide Perovskite Single Crystalscitations
- 2015Photophysics of Organic-Inorganic Hybrid Lead Iodide Perovskite Single Crystalscitations
- 2015Inside Front Cover: Hybrid Perovskites: Photophysics of Organic–Inorganic Hybrid Lead Iodide Perovskite Single Crystals (Adv. Funct. Mater. 16/2015)citations
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article
Unraveling the Broadband Emission in Mixed Tin-Lead Layered Perovskites
Abstract
<p>Low-dimensional halide perovskites with broad emission are a hot topic for their promising application as white light sources. However, the physical origin of this broadband emission in the sub-bandgap region is still controversial. This work investigates the broad Stokes-shifted emission bands in mixed lead-tin 2D perovskite films prepared by mixing precursor solutions of phenethylammonium lead iodide (PEA<sub>2</sub>PbI<sub>4</sub>, PEA = phenethylammonium) and phenethylammonium tin iodide (PEA<sub>2</sub>SnI<sub>4</sub>). The bandgap can be tuned by the lead-tin ratio, whereas the photoluminescence is broad and significantly Stokes-shifted and appears to be fairly insensitive to the relative amount of Pb and Sn. It is experimentally observed that these low-dimensional systems show substantially less bandgap bowing than their 3D counterpart. Theoretically, this can be attributed to the smaller spin–orbit coupling effect on the 2D perovskites compared to that of 3D ones. The time-resolved photoluminescence shows an ultrafast decay in the high-energy range of the spectra that coincides with the emission range of PEA<sub>2</sub>SnI<sub>4</sub>, while the broadband emission decay is slower, up to the microsecond range. Sub-gap photoexcitation experiments exclude exciton self-trapping as the origin of the broadband emission, pointing to defects as the origin of the broadband emission in 2D Sn/Pb perovskite alloys.</p>