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, Garry Rumbles, Michael J. Heben

Research output: Contribution to journalArticle

42 Scopus citations

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 (US)
Pages (from-to)11139-11149
Number of pages11
JournalJournal of Physical Chemistry C
Volume111
Issue number30
DOIs
StatePublished - Aug 2 2007
Externally publishedYes

All Science Journal Classification (ASJC) codes

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

Fingerprint Dive into the research topics of 'Low-lying exciton states determine the photophysics of semiconducting single wall carbon nanotubes'. Together they form a unique fingerprint.

Cite this