Cross Determination of Exciton Coherence Length in J-Aggregates.

ABSTRACT: The coherence length of the Frenkel excitons (N_coh) is one of the most critical parameters governing many key features of supramolecular J-aggregates. Determining experimentally the value of N_coh is a nontrivial task since it is sensitive to the technique/method applied, causing discrepancies in the literature data even for the same chemical compound and aggregation conditions. By using a combination of different experimental techniques including UV-vis-NIR, fluorescence emission, time-resolved photoluminescence, and transient absorption spectroscopies, we determined N_coh values for J-aggregates of a cyanine dye. We found that the absorption spectroscopy alone - a widely used technique- fails in determining right va

SUBMITTER: Jumbo-Nogales A 

PROVIDER: S-EPMC10401724 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature