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Visualizing the valence states of europium ions in Eu-doped BaAlO using X-ray nanoprobe mapping. | LitMetric

AI Article Synopsis

  • - This study focuses on using advanced X-ray nanoprobe techniques to analyze europium (Eu)-doped BaAlO phosphors, exploring both elemental and valence state distributions of Eu ions through X-ray fluorescence (XRF) and X-ray absorption spectroscopy (XAS).
  • - X-ray excited optical luminescence (XEOL) mapping reveals different emission characteristics in certain areas of the materials, which can help researchers understand how these emissions vary in relation to the presence of Eu ions.
  • - The findings indicate that the luminescence intensity in Eu-doped BaAlO is primarily driven by the Eu activator itself, rather than its concentration, suggesting that X-ray nanoprobes could provide a promising approach for better understanding

Article Abstract

This study develops and successfully demonstrates visualization methods for the characterization of europium (Eu)-doped BaAlO phosphors using X-ray nanoprobe techniques. X-ray fluorescence (XRF) mapping not only gives information on the elemental distributions but also clearly reveals the valence state distributions of the Eu and Eu ions. The accuracy of the estimated valence state distributions was examined by performing X-ray absorption spectroscopy (XAS) across the Eu L-edge (6.977 keV). The X-ray excited optical luminescence (XEOL) spectra exhibit different emission lines in the selected local areas. Their corresponding emission distributions can be obtained via XEOL mapping. The emission properties can be understood through correlation analysis. The results demonstrate that the main contribution to the luminescence intensity of the Eu-doped BaAlO comes from the Eu activator and the emission intensity will not be influenced by the concentration of Eu or Eu ions. It is anticipated that X-ray nanoprobes will open new avenues with significant characterization ability for unravelling the emission mechanisms of phosphor materials.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8900852PMC
http://dx.doi.org/10.1107/S1600577521012947DOI Listing

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