Birkmeier, Konrad; Hertel, Tobias; Hartschuh, Achim (2022): Probing the ultrafast dynamics of excitons in single semiconducting carbon nanotubes. Nature Communications, 13 (1). ISSN 2041-1723
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Abstract
Excitonic states govern the optical spectra of low-dimensional semiconductor nanomaterials and their dynamics are key for a wide range of applications, such as in solar energy harvesting and lighting. Semiconducting single-walled carbon nanotubes emerged as particularly rich model systems for one-dimensional nanomaterials and as such have been investigated intensively in the past. The exciton decay dynamics in nanotubes has been studied mainly by transient absorption and time-resolved photoluminescence spectroscopy. Since different transitions are monitored with these two techniques, developing a comprehensive model to reconcile different data sets, however, turned out to be a challenge and remarkably, a uniform description seems to remain elusive. In this work, we investigate the exciton decay dynamics in single carbon nanotubes using transient interferometric scattering and time-resolved photoluminescence microscopy with few-exciton detection sensitivity and formulate a unified microscopic model by combining unimolecular exciton decay and ultrafast exciton-exciton annihilation on a time-scale down to 200 fs.
Doc-Type: | Article (LMU) |
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Organisational unit (Faculties): | 18 Chemistry and Pharmacy > Department of Chemistry |
DFG subject classification of scientific disciplines: | Natural sciences |
Date Deposited: | 20. Feb 2023 14:47 |
Last Modified: | 07. Dec 2023 12:17 |
URI: | https://oa-fund.ub.uni-muenchen.de/id/eprint/609 |
DFG: | Funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) - 491502892 |