Optical Investigation of Sm doped ZrO₂

Abstract

A samarium doped polycrystalline ZrO 2 bulk sample was investigated for its phase composition as well as optical properties within the temperature range 6-300 K. From micro-Raman measurements the existence of tetragonal as well as monoclinic phase was confirmed. The emission spectrum of Sm 3+ reveals drastic changes under excitation near the region of fundamental absorption. Combined excitation-emission spectroscopy (CEES) measurements reveal three different sites for the dopant ions to be present in the sample. Nature and excitation scheme of the three sites are discussed.

The role of Nb in intensity increase of Er ion upconversion luminescence in zirconia

“…17 The spectral distribution of RE ion luminescence depends on the ZrO 2 grain size, because of the change of local crystal field around the RE ion. [18][19][20] On one hand, the increase in grain size reduces the concentration of surface defects, thus decreasing the rate of nonradiative recombination's. On the other hand, the increase of the grain size at activator concentrations less then 3 mol.…”