Low-lying exciton states determine the photophysics of semiconducting single wall carbon nanotubes

Gregory D. Scholes, Sergei Tretiak, Timothy J. McDonald, Wyatt K. Metzger, Chaiwat Engtrakul, Gary Rumbles, Michael J. Heben

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

A combined experimental and theoretical study of the photophysical properties and excited-state dynamics of semiconducting single-wall carbon nanotubes (SWNTs) is reported. Steady-state and time-resolved fluorescence data as a function of temperature are explained on the basis of a manifold of four low-lying singlet exciton states with kinetically controlled interconversion. Relaxation among these levels is slow and therefore Kasha's rule is not obeyed. Quantum chemical calculations based on time-dependent density functional theory complement the experimental findings. The temperature-dependence of the radiative and nonradiative rate constants are examined.

Original languageEnglish
Pages (from-to)11139-11149
Number of pages11
JournalJournal of Physical Chemistry C
Volume111
Issue number30
DOIs
Publication statusPublished - Aug 2 2007

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Carbon Nanotubes
Excitons
Carbon nanotubes
carbon nanotubes
excitons
Excited states
complement
Density functional theory
Rate constants
Fluorescence
density functional theory
fluorescence
Temperature
temperature dependence
excitation
temperature
LDS 751

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Electronic, Optical and Magnetic Materials
  • Surfaces, Coatings and Films
  • Energy(all)

Cite this

Scholes, G. D., Tretiak, S., McDonald, T. J., Metzger, W. K., Engtrakul, C., Rumbles, G., & Heben, M. J. (2007). Low-lying exciton states determine the photophysics of semiconducting single wall carbon nanotubes. Journal of Physical Chemistry C, 111(30), 11139-11149. https://doi.org/10.1021/jp068541j

Low-lying exciton states determine the photophysics of semiconducting single wall carbon nanotubes. / Scholes, Gregory D.; Tretiak, Sergei; McDonald, Timothy J.; Metzger, Wyatt K.; Engtrakul, Chaiwat; Rumbles, Gary; Heben, Michael J.

In: Journal of Physical Chemistry C, Vol. 111, No. 30, 02.08.2007, p. 11139-11149.

Research output: Contribution to journalArticle

Scholes, GD, Tretiak, S, McDonald, TJ, Metzger, WK, Engtrakul, C, Rumbles, G & Heben, MJ 2007, 'Low-lying exciton states determine the photophysics of semiconducting single wall carbon nanotubes', Journal of Physical Chemistry C, vol. 111, no. 30, pp. 11139-11149. https://doi.org/10.1021/jp068541j
Scholes, Gregory D. ; Tretiak, Sergei ; McDonald, Timothy J. ; Metzger, Wyatt K. ; Engtrakul, Chaiwat ; Rumbles, Gary ; Heben, Michael J. / Low-lying exciton states determine the photophysics of semiconducting single wall carbon nanotubes. In: Journal of Physical Chemistry C. 2007 ; Vol. 111, No. 30. pp. 11139-11149.
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