| 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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Docampo, Pablo
Newcastle University
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (18/18 displayed)
- 2024Untangling free carrier and exciton dynamics in layered hybrid perovskites using ultrafast optical and terahertz spectroscopycitations
- 2024The balancing act between high electronic and low ionic transport influenced by perovskite grain boundariescitations
- 2023Untangling free carrier and exciton dynamics in layered hybrid perovskites using ultrafast optical and terahertz spectroscopycitations
- 2022Structure–property investigations in urea tethered iodinated triphenylaminescitations
- 2020A general approach for hysteresis-free, operationally stable metal halide perovskite field-effect transistors.
- 2020A general approach for hysteresis-free, operationally stable metal halide perovskite field-effect transistors.
- 2019Shedding Light on the Moisture Stability of 3D/2D Hybrid Perovskite Heterojunction Thin Filmscitations
- 2018Single-crystal-like optoelectronic-properties of MAPbI3 perovskite polycrystalline thin filmscitations
- 2017Understanding charge transport in lead iodide perovskite thin-film field-effect transistorscitations
- 2016Toward Tailored Film Morphologiescitations
- 2016Hybrid Perovskite/Perovskite Heterojunction Solar Cellscitations
- 2016Synthesis of Perfectly Oriented and Micrometer-Sized MAPbBr(3) Perovskite Crystals for Thin-Film Photovoltaic Applicationscitations
- 2015Reversible Hydration of CH3NH3Pbl3 in Films, Single Crystals, and Solar Cellscitations
- 2015Reversible hydration of CH3NH3PbI3 in films, single crystals, and solar cellscitations
- 2015A Closer Look into Two-Step Perovskite Conversion with X-ray Scatteringcitations
- 2014Bright light-emitting diodes based on organometal halide perovskite.
- 2014Influence of the orientation of methylammonium lead iodide perovskite crystals on solar cell performancecitations
- 2013High-Performance Perovskite-Polymer Hybrid Solar Cells via Electronic Coupling with Fullerene Monolayerscitations
Places of action
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article
Untangling free carrier and exciton dynamics in layered hybrid perovskites using ultrafast optical and terahertz spectroscopy
Abstract
<jats:title>Abstract</jats:title><jats:p>Layered hybrid perovskites (LPKs) are promising as alternatives or additives to 3D metal halide perovskites for optoelectronic applications including photovoltaic cells, LEDs and lasers due to their increased stability. However, high exciton binding energies in these materials mean that excitons are the majority species under the operating conditions of many devices. Although the efficiency of devices that incorporate LPKs has been increasing, much is still unknown about the interplay of excitons and free charge-carriers in these materials, which is vital information for understanding how optoelectronic properties dictate device efficiency. In this work, we employ optical pump/THz probe spectroscopy (OPTP) and visible transient absorption spectroscopy (TAS) to analyse the optoelectronic properties and charge-carrier dynamics of phenylethylammonium lead iodide (PEA)<jats:sub>2</jats:sub>PbI<jats:sub>4</jats:sub>. By combining these techniques, we are able to disentangle the contributions from excitons and free charge-carriers. We observe fast cooling of free charge-carriers and exciton formation on a timescale of ~400 fs followed by slower bimolecular recombination of residual free charge-carriers with a rate constant k<jats:sub>2</jats:sub> ~10<jats:sup>9</jats:sup> cm<jats:sup>3</jats:sup>s<jats:sup>-1</jats:sup>.Excitons recombine via two monomolecular processes with lifetimest<jats:sub>1</jats:sub> ~11 ps and t<jats:sub>2</jats:sub> ~83 ps. Furthermore, we detect signatures of exciton-phonon coupling in the transient absorption kinetic traces. These findings provide a new insight into the interplay between free charge carrier and excitons well as a possible mechanism to further understand the charge-carrier dynamics in LPKs.</jats:p>