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. 2020 Feb 12;11:850. doi: 10.1038/s41467-020-14683-5

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© The Author(s) 2020

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 3 — a–c Temporal evolution of the oscillator strength (ΔOS, a), peak position (ΔE_x, b) and linewidth (ΔΓ, c), obtained through the fit of ΔR∕R(ω, t) at the excitation density of n = 5 × 10¹⁸ cm⁻³. d, e Evolution of the absorption spectra α(ω, t) of CH₃NH₃PbBr₃ single crystals in the vicinity of the excitonic resonance as calculated with the Tauc-Lorentz fit of ΔR∕R(ω, t) in the temporal windows (d) from 0 fs to 500 fs and (e) from 500 fs to 8 ps.