| 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
The role of chemical composition in determining the charge-carrier dynamics in (AgI)x(BiI3)yrudorffites
Abstract
Silver-bismuth-based perovskite-inspired materials (PIMs) are increasingly being explored as non-toxic materials in photovoltaic applications. However, many of these materials exhibit an ultrafast localization of photogenerated charge carriers that is detrimental for charge-carrier extraction. In this work, such localization processes are explored for thermally evaporated thin films of compositions lying along the (AgI) x (BiI 3 ) y series, namely BiI 3 , AgBi 2 I 7 , AgBiI 4 , Ag 2 BiI 5 , Ag 3 BiI 6 , and AgI, to investigate the impact of changing Ag + /Bi 3+ content. A persistent presence of ultrafast charge-carrier localization in all mixed compositions and BiI 3 , together with unusually broad photoluminescence spectra, reveal that eliminating silver will not suppress the emergence of a localized state. A weak change in electronic bandgap and charge-carrier mobility reveals the resilience of the electronic band structure upon modifications in the Ag + /Bi 3+ composition of the mixed-metal rudorffites. Instead, chemical composition impacts the charge-carrier dynamics indirectly via structural alterations: Ag-deficient compositions demonstrate stronger charge-carrier localization most likely because a higher density of vacant sites in the cationic sublattice imparts enhanced lattice softness. Unraveling such delicate interplay between chemical composition, crystal structure, and charge-carrier dynamics in (AgI) x (BiI 3 ) y rudorffites provides crucial insights for developing a material-by-design approach in the quest for highly efficient Bi-based PIMs.