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. 2023 Sep 28;14:6080. doi: 10.1038/s41467-023-41818-1

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© The Author(s) 2023

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 licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence 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 licence, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 5 — a Branched kinetic scheme used for global and target analysis of femto- and nanosecond transient absorption data. Type-I species correspond to weakly interacting chromophore regions, while Type-II species correspond to more strongly interacting chromophores. Species-associated spectra derived from the model in (a) for b singlet excitons, c $T T^{I I}$ triplet pairs, and (d) $T T^{I}$ triplet pairs. The blue dashed line is a guide to the eye that corresponds to the spectral position of the GSB for the singlet. The red dashed line corresponds to the GSB minimum for the $T T^{I I}$ triplet pairs.