Electron-hole dynamics in CdTe tetrapods

J Phys Chem B. 2006 Sep 7;110(35):17334-8. doi: 10.1021/jp0615306.

Abstract

We present transient absorption studies with femtosecond time resolution on the electron-hole dynamics in CdTe tetrapod nanostructures. Electron-hole pairs are generated by optical excitation in the visible spectral range, and an immediate bleach and induced absorption signal are observed. The relaxation dynamics to the lowest excitonic state is completed in about 6 ps. Experiments with polarized excitation pulses give information about the localization of the excited-state wave functions. The influence of the nanocrystal shape on the optical properties of CdTe nanoparticles is discussed.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Anisotropy
  • Cadmium Compounds / chemistry*
  • Chemistry, Physical / methods*
  • Electrons
  • Microscopy, Electron, Transmission
  • Models, Chemical
  • Molecular Conformation
  • Nanoparticles / chemistry*
  • Nanostructures / chemistry
  • Spectrophotometry
  • Static Electricity
  • Tellurium / chemistry*
  • Time Factors

Substances

  • Cadmium Compounds
  • Tellurium
  • cadmium telluride