Observation of oxygen dimers via energy transfer from silicon nanoparticles

Gazi N. Aliev, Jamaree Amonkosolpan, Daniel Wolverson

Research output: Contribution to journalLetter

1 Citation (Scopus)
106 Downloads (Pure)

Abstract

Energy transfer from photo-excited excitons confined in silicon
nanoparticles to oxygen dimers adsorbed on the nanoparticle surfaces
is studied as a function of temperature and magnetic field. Quenching
features in the nanoparticle photoluminescence spectrum arise from
energy transfer to the oxygen dimers with and without the emission of
Si TO(D) phonons and, also, with and without the vibrational excitation
of the dimers. The dependence of the quenching on magnetic field
shows that energy transfer is fast when a dimer is present, allowing an
estimate of the proportion of the nanoparticles with adsorbed dimers.
Original languageEnglish
Pages (from-to)690-693
JournalPhysical Chemistry Chemical Physics
Volume18
Issue number2
Early online date1 Dec 2015
DOIs
Publication statusPublished - 14 Jan 2016

Keywords

  • porous silicon
  • oxygen
  • photoluminescence
  • dimol
  • dimer
  • energy transfer

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