| 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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Herz, Lm
University of Oxford
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (40/40 displayed)
- 2025Structural and electronic features enabling delocalized charge-carriers in CuSbSe 2citations
- 2024In situ nanoscopy of single-grain nanomorphology and ultrafast carrier dynamics in metal halide perovskitescitations
- 2024Contrasting ultra-low frequency Raman and infrared modes in emerging metal halides for photovoltaicscitations
- 2024Disentangling the effects of structure and lone-pair electrons in the lattice dynamics of halide perovskitescitations
- 2024Chloride-based additive engineering for efficient and stable wide-bandgap perovskite solar cellscitations
- 2024Unraveling loss mechanisms arising from energy‐level misalignment between metal halide perovskites and hole transport layerscitations
- 2023Exciton Formation Dynamics and Band‐Like Free Charge‐Carrier Transport in 2D Metal Halide Perovskite Semiconductorscitations
- 2023Atomistic understanding of the coherent interface between lead iodide perovskite and lead iodidecitations
- 2023Exciton formation dynamics and band-like free charge-carrier transport in 2D metal halide perovskite semiconductorscitations
- 2023Bandlike transport and charge-carrier dynamics in BiOI filmscitations
- 2023Chloride‐Based Additive Engineering for Efficient and Stable Wide‐Bandgap Perovskite Solar Cellscitations
- 2023Contrasting charge-carrier dynamics across key metal-halide perovskite compositions through in situ simultaneous probescitations
- 2023A templating approach to controlling the growth of coevaporated halide perovskitescitations
- 2022Thermally stable perovskite solar cells by all-vacuum depositioncitations
- 2022Solvent-free method for defect reduction and improved performance of p-i-n vapor-deposited perovskite solar cellscitations
- 2022Understanding and suppressing non-radiative losses in methylammonium-free wide-bandgap perovskite solar cellscitations
- 2022Air-degradation mechanisms in mixed lead-tin halide perovskites for solar cellscitations
- 2022Excellent long-range charge-carrier mobility in 2D perovskitescitations
- 2022Optoelectronic properties of mixed iodide-bromide perovskites from first-principles computational modeling and experimentcitations
- 2021Nanotechnology for catalysis and solar energy conversioncitations
- 2021Revealing ultrafast charge-carrier thermalization in tin-iodide perovskites through novel pump-push-probe terahertz spectroscopycitations
- 2021Chemical control of the dimensionality of the octahedral network of solar absorbers from the CuI-AgI-BiI3 phase space by synthesis of 3D CuAgBiI5citations
- 2021Highly absorbing lead-free semiconductor Cu2AgBiI6 for photovoltaic applications from the quaternary CuI-AgI-BiI3 phase spacecitations
- 2021Impact of tin fluoride additive on the properties of mixed tin-lead iodide perovskite semiconductorscitations
- 2021Ultrafast excited-state localization in Cs2AgBiBr6 double perovskitecitations
- 2021Efficient energy transfer mitigates parasitic light absorption in molecular charge-extraction layers for perovskite solar cellscitations
- 2021Limits to electrical mobility in lead-halide perovskite semiconductorscitations
- 2021Charge-carrier mobility and localization in semiconducting CU2AGBiI6 for photovoltaic applicationscitations
- 2021Highly Absorbing Lead-Free Semiconductor Cu₂AgBiI₆ for Photovoltaic Applications from the Quaternary CuI-AgI-BiI₃ Phase Space
- 2021Polarons and charge localization in metal-halide semiconductors for photovoltaic and light-emitting devicescitations
- 2020Charge‐carrier trapping and radiative recombination in metal halide perovskite semiconductorscitations
- 2020Charge-carrier trapping dynamics in bismuth-doped thin films of MAPbBr3 perovskitecitations
- 2020Terahertz Conductivity Analysis for Highly Doped Thin-Film Semiconductorscitations
- 2020Metal composition influences optoelectronic quality in mixed-metal lead-tin triiodide perovskite solar absorberscitations
- 2020Terahertz conductivity analysis for highly doped thin-film semiconductorscitations
- 2020CsPbBr3 nanocrystal films: deviations from bulk vibrational and optoelectronic propertiescitations
- 2020Control over crystal size in vapor deposited metal-halide perovskite filmscitations
- 2020Atomic-scale microstructure of metal halide perovskitecitations
- 2017Near-Infrared and short-wavelength infrared photodiodes based on dye-perovskite compositescitations
- 2017Crystallization kinetics and morphology control of formamidinium-cesium mixed-cation lead mixed-halide perovskite via tunability of the colloidal precursor solutioncitations
Places of action
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article
Exciton Formation Dynamics and Band‐Like Free Charge‐Carrier Transport in 2D Metal Halide Perovskite Semiconductors
Abstract
<jats:title>Abstract</jats:title><jats:p>Metal halide perovskite (MHP) semiconductors have driven a revolution in optoelectronic technologies over the last decade, in particular for high‐efficiency photovoltaic applications. Low‐dimensional MHPs presenting electronic confinement have promising additional prospects in light emission and quantum technologies. However, the optimisation of such applications requires a comprehensive understanding of the nature of charge carriers and their transport mechanisms. This study employs a combination of ultrafast optical and terahertz spectroscopy to investigate phonon energies, charge‐carrier mobilities, and exciton formation in 2D (PEA)<jats:sub>2</jats:sub>PbI<jats:sub>4</jats:sub> and (BA)<jats:sub>2</jats:sub>PbI<jats:sub>4</jats:sub> (where PEA is phenylethylammonium and BA is butylammonium). Temperature‐dependent measurements of free charge‐carrier mobilities reveal band transport in these strongly confined semiconductors, with surprisingly high in‐plane mobilities. Enhanced charge‐phonon coupling is shown to reduce charge‐carrier mobilities in (BA)<jats:sub>2</jats:sub>PbI<jats:sub>4</jats:sub> with respect to (PEA)<jats:sub>2</jats:sub>PbI<jats:sub>4</jats:sub>. Exciton and free charge‐carrier dynamics are disentangled by simultaneous monitoring of transient absorption and THz photoconductivity. A sustained free charge‐carrier population is observed, surpassing the Saha equation predictions even at low temperature. These findings provide new insights into the temperature‐dependent interplay of exciton and free‐carrier populations in 2D MHPs. Furthermore, such sustained free charge‐carrier population and high mobilities demonstrate the potential of these semiconductors for applications such as solar cells, transistors, and electrically driven light sources.</jats:p>