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Published on: September 13, 2024
Multisite Fe3+ Luminescent Centers in the LiGaO2:Fe Nanocrystalline Phosphor
Ajeesh Kumar Somakumar1, Ivo Romet2, Agnieszka Grabias3
1Institute of Physics, Polish Academy of Sciences, Aleja Lotników 32/46, 02-668 Warsaw, Poland.
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An extensive experimental study of trivalent iron (Fe3+) ions in orthorhombic lithium gallate nanocrystals was undertaken. Various spectroscopic methods, such as Raman spectroscopy, extended X-ray absorption fine structure, the Mössbauer effect, electron paramagnetic resonance, photoluminescence, thermoluminescence, and cathodoluminescence were used to investigate the synthesized phosphor. This study revealed the existence of multiple Fe3+ sites, out of which the tetrahedral sites are preferentially occupied. Extensive optical studies showed that the Fe3+ doped lithium gallate phosphor is a promising candidate for various luminescence and thermoluminescence-related applications in the near-infrared regime.
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