Computational study of energy transfer in two-dimensional J-aggregates

Lazaros K. Gallos, Panos Argyrakis, A. Lobanov, A. Vitukhnovsky

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


We perform a computational analysis of the intra- and interband energy transfer in two-dimensional J-aggregates. Each aggregate is represented as a two-dimensional array (LB-film or self-assembled film) of two kinds of cyanine dyes. We consider the J-aggregate whose J-band is located at a shorter wavelength to be a donor and an aggregate or a small impurity with longer wavelength to be an acceptor. Light absorption in the blue wing of the donor aggregate gives rise to the population of its excitonic states. The depopulation of these states is possible by (a) radiative transfer to the ground state, (b) intraband energy transfer, and (c) interband energy transfer to the acceptor. We study the dependence of energy transfer on properties such as the energy gap, the diagonal disorder, and the exciton-phonon interaction strength. Experimentally observable parameters, such as the position and form of luminescence spectrum, and results of the kinetic spectroscopy measurements strongly depend upon the density of states in excitonic bands, rates of energy exchange between states and oscillator strengths for luminescent transitions originating from these states.

Original languageEnglish (US)
Pages (from-to)246-252
Number of pages7
JournalJournal of Luminescence
Issue number4 SPEC. ISS.
StatePublished - Dec 10 2004
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Biophysics
  • Atomic and Molecular Physics, and Optics
  • Chemistry(all)
  • Biochemistry
  • Condensed Matter Physics


  • Exciton transport
  • Frenkel excitons
  • J-aggregates


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