In this paper, high concentration (up to 40% of rare earth with respect to the metal oxides) Eu3+-doped ZrO2, Y2O3 and ZrO2–Y2O3 systems were prepared both as bulk material and as nanoparticles embedded in SiO2. The latter nanocomposites were obtained as a result of a thermal treatment at 1000 C of powder samples prepared by the sol–gel method. The combination of transmission electron microscopy (TEM), X-ray scattering (WAXS) and photoluminescence (PL) spectroscopy enabled us to obtain detailed information about morphology and composition of the rare earth-doped nanoparticles. In particular, for nanostructured samples, high luminescence has been observed in spite of a very high rare earth concentration in the active host.

Reduction of concentration-induced luminescence quenching in Eu3+-doped nanoparticles embedded in silica

RIELLO, Pietro;BUCELLA, STEFANIA;FOSSA, Filippo;BENEDETTI, Alvise;TRAVE, Enrico;MAZZOLDI, Paolo
2006-01-01

Abstract

In this paper, high concentration (up to 40% of rare earth with respect to the metal oxides) Eu3+-doped ZrO2, Y2O3 and ZrO2–Y2O3 systems were prepared both as bulk material and as nanoparticles embedded in SiO2. The latter nanocomposites were obtained as a result of a thermal treatment at 1000 C of powder samples prepared by the sol–gel method. The combination of transmission electron microscopy (TEM), X-ray scattering (WAXS) and photoluminescence (PL) spectroscopy enabled us to obtain detailed information about morphology and composition of the rare earth-doped nanoparticles. In particular, for nanostructured samples, high luminescence has been observed in spite of a very high rare earth concentration in the active host.
File in questo prodotto:
File Dimensione Formato  
OptMat1.pdf

non disponibili

Tipologia: Documento in Post-print
Licenza: Accesso chiuso-personale
Dimensione 273.32 kB
Formato Adobe PDF
273.32 kB Adobe PDF   Visualizza/Apri

I documenti in ARCA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10278/29291
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 18
  • ???jsp.display-item.citation.isi??? 17
social impact