Non-equilibrium carriers and recombination phenomena in type-II quantum dots

A. Shik*, H. Ruda, E. H. Sargent

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

14 Scopus citations

Abstract

Non-equilibrium properties of quantum dots forming type-II heterostructures with the matrix material are analysed theoretically. Their main distinction from standard type-I dots results from the separation of non-equilibrium carriers in a staggered band diagram and, hence, a decisive role of Coulomb potentials creating potential barriers for recombination. Depending on the material parameters and temperature, these barriers are overcome either by activation or by tunnelling. For both recombination mechanisms, the amplitude of potential, the quantum dot charge, the recombination time, the luminescence spectrum and some other non-equilibrium characteristics are calculated for different intensities of optical excitation.

Original languageEnglish (US)
Pages (from-to)523-528
Number of pages6
JournalNanotechnology
Volume12
Issue number4
DOIs
StatePublished - Dec 2001
Event9th International Symposium on Nanostructures: Physics and Technology - St. Petersburg, Russian Federation
Duration: Jun 18 2001Jun 22 2001

ASJC Scopus subject areas

  • Bioengineering
  • General Chemistry
  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

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