Laser Physics

, Volume 16, Issue 12, pp 1625–1632

Interaction of CdSe/ZnS core-shell semiconductor nanocrystals in solid thin films

  • A. A. Chistyakov
  • I. L. Martynov
  • K. E. Mochalov
  • V. A. Oleinikov
  • S. V. Sizova
  • E. A. Ustinovich
  • K. V. Zakharchenko
Laser Spectroscopy

DOI: 10.1134/S1054660X06120061

Cite this article as:
Chistyakov, A.A., Martynov, I.L., Mochalov, K.E. et al. Laser Phys. (2006) 16: 1625. doi:10.1134/S1054660X06120061

Abstract

The optical properties of CdSe/ZnS semiconductor nanocrystals with the core-shell structure are studied upon visible-laser excitation in a wide range of flux densities. It is demonstrated that the dimensional quantization effect is preserved in the films with a limiting high concentration of nanocrystals. A strong bathochromic shift of the absorption and luminescence peaks relative to the peak positions in the corresponding spectra of nanocrystals in films with a relatively low concentration of nanocrystals and solutions is caused by a high concentration of nanocrystals and the dipole moment related to the asymmetry of the nanoparticles. The shift is varied from 35 to 50 nm depending on the film thickness. The luminescence spectra of the films remain unchanged upon an increase in the laser intensity to 1 × 106 W/cm2. The laser action on the nanoparticle films is studied at intensities (5 × 106−1 × 109 W/cm2) higher than the damage threshold.

PACS numbers

81.07.Bc81.20.Fw42.62.Fi78.67.Hc78.67.Pt

Copyright information

© MAIK “Nauka/Interperiodica” 2006

Authors and Affiliations

  • A. A. Chistyakov
    • 1
  • I. L. Martynov
    • 1
  • K. E. Mochalov
    • 2
  • V. A. Oleinikov
    • 2
  • S. V. Sizova
    • 2
  • E. A. Ustinovich
    • 3
  • K. V. Zakharchenko
    • 1
  1. 1.Moscow Engineering Physical InstituteState UniversityMoscowRussia
  2. 2.Shemyakin-Ovchinnikov Institute of Bioorganic ChemistryRussian Academy of SciencesMoscowRussia
  3. 3.Physicochemical Research InstituteBelarussian State UniversityBelarus