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Electron capture and intra-band relaxation by means of Auger processes in colloidal semiconductor nanocrystals

Authors
Journal
Physica B Condensed Matter
0921-4526
Publisher
Elsevier
Publication Date
Volume
406
Issue
3
Identifiers
DOI: 10.1016/j.physb.2010.10.053
Keywords
  • Colloidal Quantum Dot
  • Electron Capture
  • Auger Processes
  • Relaxation Rate
Disciplines
  • Physics

Abstract

Abstract The electron relaxation dynamics in combination with LO phonon-assisted electron capture and intra-dot Auger scattering processes in a spherical quantum dot embedded in non-polar matrix is presented theoretically. The electron capture efficiency is investigated as a function of the lattice temperature and quantum dot radius for a deferent injected electron concentration, taking into account the confinement effect of the polar optical phonons in spherical quantum dots. Exact numerical calculations for the phonon-assisted electron capture rate as well as for the Auger scattering rate in colloidal CdSe quantum dot have been carried out. These calculations are consistent with experiment.

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