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30 September 2024 Imaging ultrafast charge transfer at n = 3/n = 1 low-dimensional perovskites single flake heterostructures
Fabiola Faini, Yaiza Asensio, Federico Visentin, Lucia Olano-Vegas, Martin Hormann, Luis E. Hueso, Giulio Cerullo, Franco V. A. Camargo, Beatriz Martin Garcia, Giulia Grancini
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Proceedings Volume 13123, Organic, Hybrid, and Perovskite Photovoltaics XXV; 1312313 (2024) https://doi.org/10.1117/12.3028790
Event: Organic Photonics + Electronics, 2024, San Diego, California, United States
Abstract
To fulfill the promise of two-dimensional perovskites (2DPs) for high-performance optoelectronics, we used mechanical exfoliation to obtain n = 1 / n = 3 2DP-heterostructures and ultrafast techniques to characterize charge carriers’ dynamics at interface. In the presence of the heterostructure, we observe the suppression of excitonic-radiative recombination and the introduction of a fast decay channel for excitons (t < 2 ns) which explains more than 80% of the total photoluminescence decay. Such evidence can be explained through ultrafast electron and hole transfer at the heterostructure interface.
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Fabiola Faini, Yaiza Asensio, Federico Visentin, Lucia Olano-Vegas, Martin Hormann, Luis E. Hueso, Giulio Cerullo, Franco V. A. Camargo, Beatriz Martin Garcia, and Giulia Grancini "Imaging ultrafast charge transfer at n = 3/n = 1 low-dimensional perovskites single flake heterostructures", Proc. SPIE 13123, Organic, Hybrid, and Perovskite Photovoltaics XXV, 1312313 (30 September 2024); https://doi.org/10.1117/12.3028790
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KEYWORDS
Heterojunctions
Ultrafast phenomena
Perovskite
Excitons
Interfaces
Quantum interfaces
Photoluminescence
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