| 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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Angelis, Filippo De
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (30/30 displayed)
- 2024Combining Trivalent Ion-Doping with Halide Alloying toIncrease the Efficiency of Tin Perovskitescitations
- 2024How Photogenerated I2 Induces I-Rich Phase Formation in Lead Mixed Halide Perovskitescitations
- 2023Cu/Ag–Sb–I Rudorffite Thin Films for Photovoltaic Applicationscitations
- 2023The Origin of Broad Emission in ⟨100⟩ Two-Dimensional Perovskites: Extrinsic vs Intrinsic Processes.
- 2023Band gap tuning through cation and halide alloying in mechanochemically synthesized Cs3(Sb1−xBix)2Br9 and Cs3Sb2(I1−xBrx)9 solid solutionscitations
- 2023How Photogenerated I2 Induces I‐rich Phase Formation in Lead Mixed Halide Perovskitescitations
- 2023Synergistic Role of Water and Oxygen Leads to Degradation in Formamidinium-Based Halide Perovskitescitations
- 2023Tuning Structure and Excitonic Properties of 2D Ruddlesden–Popper Germanium, Tin, and Lead Iodide Perovskites via Interplay between Cationscitations
- 2023How Halide Alloying Influences the Optoelectronic Quality in Tin-Halide Perovskite Solar Absorberscitations
- 2023Plasma‐Driven Atomic‐Scale Tuning of Metal Halide Perovskite Surfaces: Rationale and Photovoltaic Applicationcitations
- 2023Band gap tuning through cation and halide alloying in mechanochemically synthesized Cs<sub>3</sub>(Sb<sub>1−<i>x</i></sub>Bi<sub><i>x</i></sub>)<sub>2</sub>Br<sub>9</sub> and Cs<sub>3</sub>Sb<sub>2</sub>(I<sub>1−<i>x</i></sub>Br<sub><i>x</i></sub>)<sub>9</sub> solid solutionscitations
- 2023Rationalizing Electron–Phonon Interactions and Hot Carriers Cooling in 2D to 3D Metal Halide Perovskitescitations
- 2023Band Gap Tuning Through Cation and Halide Alloying in Mechanochemical Synthesized Cs3(Sb1-xBix)2Br9 and Cs3Sb2(I1-xBrx)9 Solid Solutionscitations
- 2023Air- and water-stable and photocatalytically active germanium-based 2D perovskites by organic spacer engineeringcitations
- 2022Functionalized BODIPYs as Tailor‐Made and Universal Interlayers for Efficient and Stable Organic and Perovskite Solar Cellscitations
- 2022Reaction Mechanism of Photocatalytic Hydrogen Production at Water/Tin Halide Perovskite Interfacescitations
- 2022The Origin of Broad Emission in â ¨100»Two-Dimensional Perovskites: Extrinsic vs Intrinsic Processes
- 2021Tuning halide perovskite energy levelscitations
- 2021Experimental Strategy and Mechanistic View to Boost the Photocatalytic Activity of Cs3Bi2Br9 Lead‐Free Perovskite Derivative by g‐C3N4 Composite Engineeringcitations
- 2021Water‐Stable DMASnBr3 Lead‐Free Perovskite for Effective Solar‐Driven Photocatalysiscitations
- 2021Enhanced Stability of MAPbI<sub>3</sub> Perovskite Films with Zirconium Phosphate‐Phosphonomethylglycine Nanosheets as Additivecitations
- 2020Origin of pressure-induced band gap tuning in tin halide perovskitescitations
- 2019Charge Carriers Are Not Affected by the Relatively Slow-Rotating Methylammonium Cations in Lead Halide Perovskite Thin Filmscitations
- 2019Controlling competing photochemical reactions stabilizes perovskite solar cellscitations
- 2019Defect activity in lead halide perovskitescitations
- 2019Band Gap Engineering in MASnBr3and CsSnBr3 Perovskites: Mechanistic Insights through the Application of Pressurecitations
- 2019Stable Ligand Coordination at the Surface of Colloidal CsPbBr3 Nanocrystalscitations
- 2018Ionotronic halide perovskite drift-diffusive synapses for low-power neuromorphic computationcitations
- 2018Iodine chemistry determines the defect tolerance of lead-halide perovskitescitations
- 2017Migration of cations induces reversible performance losses over day/night cycling in perovskite solar cellscitations
Places of action
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article
Charge Carriers Are Not Affected by the Relatively Slow-Rotating Methylammonium Cations in Lead Halide Perovskite Thin Films
Abstract
<p>Recently, several studies have investigated dielectric properties as a possible origin of the exceptional optoelectronic properties of metal halide perovskites (MHPs). In this study we investigated the temperature-dependent dielectric behavior of different MHP films at different frequencies. In the gigahertz regime, dielectric losses in methylammonium-based samples are dominated by the rotational dynamics of the organic cation. Upon increasing the temperature from 160 to 300 K, the rotational relaxation time, τ, decreases from 400 (200) to 6 (1) ps for MAPb-I<sub>3</sub> (-Br<sub>3</sub>). By contrast, we found negligible temperature-dependent variations in τ for a mixed cation/mixed halide FA<sub>0.85</sub>MA<sub>0.15</sub>Pb(I<sub>0.85</sub>Br<sub>0.15</sub>)<sub>3</sub>. From temperature-dependent time-resolved microwave conductance measurements we conclude that the dipolar reorientation of the MA cation does not affect charge carrier mobility and lifetime in MHPs. Therefore, charge carriers do not feel the relatively slow-moving MA cations, despite their great impact on the dielectric constants.</p>