Exciton decay dynamics in individual carbon nanotubes at room temperature

Tobias Gokus, Achim Hartschuh, Hayk Harutyunyan, Maria Allegrini, Frank Hennrich, Manfred Kappes, Alexander A. Green, Mark C. Hersam, Paulo T. Araújo, Ado Jorio

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Abstract

We studied the exciton decay dynamics of individual semiconducting single-walled carbon nanotubes at room temperature using time-resolved photoluminescence spectroscopy. The photoluminescence decay from nanotubes of the same (n,m) type follows a single exponential decay function, however, with lifetimes varying between about 1 and 40 ps from nanotube to nanotube. A correlation between broad photoluminescence spectra and short lifetimes was found and explained by defects promoting both nonradiative decay and vibronic dephasing.

Original languageEnglish (US)
Article number153116
JournalApplied Physics Letters
Volume92
Issue number15
DOIs
StatePublished - Apr 24 2008
Externally publishedYes

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ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Gokus, T., Hartschuh, A., Harutyunyan, H., Allegrini, M., Hennrich, F., Kappes, M., Green, A. A., Hersam, M. C., Araújo, P. T., & Jorio, A. (2008). Exciton decay dynamics in individual carbon nanotubes at room temperature. Applied Physics Letters, 92(15), [153116]. https://doi.org/10.1063/1.2913009