Ultraviolet excitation of rare-earth-doped YSZ crystals |
| |
Authors: | B. Savoini J. E. Muñoz-Santiuste R. González |
| |
Affiliation: | Departamento de Física Escuela Politécnica Superior , Universidad Carlos III , Avda. de la Universidad 30, Leganés, 28911, Madrid, Spain |
| |
Abstract: | Abstract The optical properties of nominally pure and Er3+- or Pr3+ -doped yttria-stabilized zirconia single crystals were investigated under UV light excitation. In the excitation spectra of both types of doped crystals, a broad UV band is observed. Under excitation with light of different wavelengths inside this band, the luminescence features of the doped crystals are different. YSZ: Pr3+ samples exhibit the characteristic 4f → 4f emission of the Pr3+ ions. In YSZ: Er3+ crystals, both the Er3+ ion and the intrinsic luminescence are observed. Host to Er3+ ion radiative energy-transfer is also demonstrated. No dependence of the transfer process with the excitation wavelength was found. These results suggest that the UV band in Er3+ -doped crystals is associated with the lattice-dopant ion interaction rather than with the 4f5d interconfigurational band of the Er3? ions. |
| |
Keywords: | YSZ Er3+ Pr3+ Optical properties Ion-lattice interaction |
|
|