Analysing the photoluminescence intensities of single-walled carbon nanotubes

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Year: 2012
Type of Publication: Article
  • Sebastian Heeg, Michael S. Strano Joel T. Abrahamson
Journal: Physica Status Solidi B-Basic Solid State Physics Volume: 249
Number: 12 Pages: 2473-2478
Month: DEC 2012
PT: J; TC: 0; UT: WOS:000312215300041
We study the photoluminescence and photoluminescence excitation intensities of single-walled carbon nanotubes. To derive the chirality fractions of semiconducting tubes from these optical methods requires a thorough analysis of the experimental parameters and the lifetimes of the excitonic states. We obtain the intensity distribution from the product of the widths of the first and second excitonic transition and the intensity of the absorption of the second excited state. Compared with previous analysis protocols our intensity distribution points towards a chirality abundance which is (i) narrower in diameter, (ii) centred at smaller diameters and (iii) more strongly dominated by armchair-like tubes. We present a recipe for the fit of luminescence data.