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  • Archive: 2022
29 Oct 2022
  • 2022
  • V. 21
  • 1
  • (p.18 - 24)

Luminescence of yttrium tantalate doubly activated with europium and terbium under x-ray and electron beam excitations

DOI: https://doi.org/10.53081/mjps.2022.21-1.01

Authors:

Mihail Nazarov; Maria Zamoryanskaya

Summary:

This paper reports the luminescence spectra of YTaO4 activated with rare-earth ions, such as Eu3+ and Tb3+. The effect of these rare-earth ions on the luminescence of yttrium tantalate phosphors is studied. The luminescent properties are studied under X-ray and electron beam excitations. It is found that, under these excitations, the emission centers of the rare-earth activators (Eu3+, Tb3+) efficiently contribute to the overall luminescence. Color cathodoluminescence images clearly show the dependence of chromaticity on the different activators. These rare-earth activated phosphors exhibiting various luminescence chromaticities are promising materials for optoelectronic applications and for X-ray intensifying screens in medical diagnosis, because they provide a broad variation of visible photoluminescence from blue to red.

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Keywords

  • YTaO4
  • YTaO4:Eu3+
  • Tb3+
  • cathodoluminescence
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GHITU INSTITUTE OF ELECTRONIC
ENGINEERING AND NANOTECHNOLOGIES
INSTITUTE OF APPLIED PHYSICS
STATE UNIVERSITY OF MOLDOVA
PHYSICAL SOCIETY OF MOLDOVA

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