Coherent Vibrational Dynamics of Exciton Self-Trapping in Lead-Free Double Halide Perovskites

Soumen Ghosh; Piotr Kabacinski; Hemen Hosseini; Shunran Li; Franco V.A. Camargo; Peijun Guo; Giulio Cerullo; Giulio Cerullo

doi:10.1364/UP.2022.Tu4A.51

The International Conference on Ultrafast Phenomena (UP) 2022
Technical Digest Series (Optica Publishing Group, 2022),
paper Tu4A.51
•https://doi.org/10.1364/UP.2022.Tu4A.51

Coherent Vibrational Dynamics of Exciton Self-Trapping in Lead-Free Double Halide Perovskites

Soumen Ghosh, Piotr Kabacinski, Hemen Hosseini, Shunran Li, Franco V.A. Camargo, Peijun Guo, and Giulio Cerullo

International Conference on Ultrafast Phenomena 2022

Montreal, Quebec Canada
18–22 July 2022
ISBN: 978-1-957171-07-4

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Joint Poster Session I: Remote (Tu4A)

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S. Ghosh, P. Kabacinski, H. Hosseini, S. Li, F. V. A. Camargo, P. Guo, and G. Cerullo, "Coherent Vibrational Dynamics of Exciton Self-Trapping in Lead-Free Double Halide Perovskites," in The International Conference on Ultrafast Phenomena (UP) 2022, F. Légaré, T. Tahara, J. Biegert, T. Brixner, and N. Dudovich, eds., Technical Digest Series (Optica Publishing Group, 2022), paper Tu4A.51.

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Abstract

We have directly observed the vibrationally coherent formation of self-trapped excitons in perovskites using sub-30 fs UV-pumped transient absorption spectroscopy. Strongly damped, excited-state structural distortions promote its formation on a sub-110 fs time scale.

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