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

The International Conference on Ultrafast Phenomena (UP) 2022（2022）

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摘要

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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关键词

self-trapping,lead-free

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