Jump to main content
Jump to site search

Issue 3, 2016
Previous Article Next Article

Exciton–exciton annihilation and relaxation pathways in semiconducting carbon nanotubes

Author affiliations

Abstract

We present a thorough analysis of one- and two-color transient absorption measurements performed on single- and double-walled semiconducting carbon nanotubes. By combining the currently existing models describing exciton–exciton annihilation—the coherent and the diffusion-limited ones—we are able to simultaneously reproduce excitation kinetics following both E11 and E22 pump conditions. Our simulations revealed the fundamental photophysical behavior of one-dimensional coherent excitons and non-trivial excitation relaxation pathways. In particular, we found that after non-linear annihilation a doubly-excited exciton relaxes directly to its E11 state bypassing the intermediate E22 manifold, so that after excitation resonant with the E11 transition, the E22 state remains unpopulated. A quantitative explanation for the observed much faster excitation kinetics probed at E22 manifold, comparing to those probed at the E11 band, is also provided.

Graphical abstract: Exciton–exciton annihilation and relaxation pathways in semiconducting carbon nanotubes

Back to tab navigation

Publication details

The article was received on 03 Oct 2015, accepted on 05 Dec 2015 and first published on 07 Dec 2015


Article type: Paper
DOI: 10.1039/C5NR06853C
Author version available: Download Author version (PDF)
Citation: Nanoscale, 2016,8, 1618-1626
  •   Request permissions

    Exciton–exciton annihilation and relaxation pathways in semiconducting carbon nanotubes

    J. Chmeliov, J. Narkeliunas, M. W. Graham, G. R. Fleming and L. Valkunas, Nanoscale, 2016, 8, 1618
    DOI: 10.1039/C5NR06853C

Search articles by author

Spotlight

Advertisements