Effect of spatial confinement on luminescence of Y3Al5O12 nano-particles doped with chromium ions

Ozen G., Erdem M., Collins J., BETTINELLI M., Di Bartolo B., PICCINELLI F., ...More

JOURNAL OF LUMINESCENCE, vol.144, pp.191-197, 2013 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 144
  • Publication Date: 2013
  • Doi Number: 10.1016/j.jlumin.2013.07.007
  • Journal Name: JOURNAL OF LUMINESCENCE
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.191-197
  • Istanbul Technical University Affiliated: Yes

Abstract

We have studied the spectroscopic properties of four nano-powder samples of Y3Al5O12: Cr particles with diameters ranging from 28 nm to 250 nm. For each sample we have measured accurately the emission spectrum in a wide range of temperatures ranging from 30 to more than 600 K. The spectra generally consisted of the R-lines narrow spectral emission and of the accompanying vibronic side-bands. We noted the increase of the vibronic emission intensity with respect to the R-line intensity going from the larger to the shorter diameter powders. For each sample we have also measured the decay patterns of the excited Cr ions following a pulsed excitation. These measurements were conducted in the same temperature range (30-600 K) in order to fully characterize the samples examined.