| 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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Motti, Silvia Genaro
University of Southampton
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (10/10 displayed)
- 2024The role of chemical composition in determining the charge-carrier dynamics in (AgI)x(BiI3)yrudorffitescitations
- 2024Disentangling the effects of structure and lone-pair electrons in the lattice dynamics of halide perovskitescitations
- 2024Unraveling loss mechanisms arising from energy‐level misalignment between metal halide perovskites and hole transport layerscitations
- 2022Optoelectronic properties of mixed iodide−bromide perovskites from first-principles computational modeling and experimentcitations
- 2022Excellent long-range charge-carrier mobility in 2D perovskitescitations
- 2020CsPbBr3 nanocrystal films: deviations from bulk vibrational and optoelectronic propertiescitations
- 2019Controlling competing photochemical reactions stabilizes perovskite solar cellscitations
- 2019Defect activity in lead halide perovskitescitations
- 2018Iodine chemistry determines the defect tolerance of lead-halide perovskitescitations
- 2018Probing device degradation and electric fields in polymeric field-effect transistors by SFG vibrational spectroscopycitations
Places of action
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article
CsPbBr3 nanocrystal films: deviations from bulk vibrational and optoelectronic properties
Abstract
Metal‐halide perovskites (MHP) are highly promising semiconductors for light‐emitting and photovoltaic applications. The colloidal synthesis of nanocrystals (NCs) is an effective approach for obtaining nearly defect‐free MHP that can be processed into inks for low‐cost, high‐performance device fabrication. However, disentangling the effects of surface ligands, morphology, and boundaries on charge‐carrier transport in thin films fabricated with these high‐quality NCs is inherently difficult. To overcome this fundamental challenge, terahertz (THz) spectroscopy is employed to optically probe the photoconductivity of CsPbBr3 NC films. The vibrational and optoelectronic properties of the NCs are compared with those of the corresponding bulk polycrystalline perovskite and significant deviations are found. Charge‐carrier mobilities and recombination rates are demonstrated to vary significantly with the NC size. Such dependences derive from the localized nature of charge carriers within NCs, with local mobilities dominating over interparticle transport. It is further shown that the colloidally synthesized NCs have distinct vibrational properties with respect to the bulk perovskite, exhibiting blue‐shifted optical phonon modes with enhanced THz absorption strength that also manifest as strong modulations in the THz photoconductivity spectra. Such fundamental insights into NC versus bulk properties will guide the optimization of nanocrystalline perovskite thin films for optoelectronic applications.