Logo
EnglishCookie löschen - von nun an wird die Spracheinstellung Ihres Browsers verwendet.
Hagen, Axel; Steiner, Mathias; Raschke, Markus B.; Lienau, Christoph; Hertel, Tobias; Qian, Huihong; Meixner, Alfred Johann; Hartschuh, Achim (2005): Exponential Decay Lifetimes of Excitons in Individual Single-Walled Carbon Nanotubes. In: Physical Review Letters, Vol. 95, Nr. 19: 197401-1-197401-4
[img]
Vorschau

PDF

1MB

Abstract

The dynamics of excitons in individual semiconducting single-walled carbon nanotubes was studied using time-resolved photoluminescence (PL) spectroscopy. The PL decay from tubes of the same (n,m) type was found to be monoexponential, however, with lifetimes varying between less than 20 and 200 ps from tube to tube. Competition of nonradiative decay of excitons is facilitated by a thermally activated process, most likely a transition to a low-lying optically inactive trap state that is promoted by a low-frequency phonon mode.