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Fitting Single-Walled Carbon Nanotube Optical Spectra

Pfohl, Moritz; Tune, Daniel D.; Graf, Arko; Zaumseil, Jana; Krupke, Ralph; Flavel, Benjamin S.

Abstract:
In this work, a comprehensive methodology for the fitting of single-walled carbon nanotube absorption spectra is presented. Different approaches to background subtraction, choice of line profile, and calculation of full width at half-maximum are discussed both in the context of previous literature and the contemporary understanding of carbon nanotube photophysics. The fitting is improved by the inclusion of exciton–phonon sidebands, and new techniques to improve the individualization of overlapped nanotube spectra by exploiting correlations between the first- and second-order optical transitions and the exciton–phonon sidebands are presented. Consideration of metallic nanotubes allows an analysis of the metallic/semiconducting content, and a process of constraining the fit of highly congested spectra of carbon nanotube solid films according to the spectral weights of each (n, m) species in solution is also presented, allowing for more reliable resolution of overlapping peaks into single (n, m) species contributions.


Zugehörige Institution(en) am KIT Institut für Nanotechnologie (INT)
Publikationstyp Zeitschriftenaufsatz
Jahr 2017
Sprache Englisch
Identifikator DOI: 10.1021/acsomega.6b00468
ISSN: 2470-1343, 2470-1343
KITopen ID: 1000068763
HGF-Programm 43.21.03; LK 01
Erschienen in ACS Omega
Band 2
Heft 3
Seiten 1163–1171
Schlagworte Exciton; Luminescence; Nanoclusters; Phonon; Spectra
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