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Nagirnyi, Vitali
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Publications (2/2 displayed)
- 2014Revised crystal structure and luminescent properties of gadolinium oxyfluoride Gd<inf>4</inf>O<inf>3</inf>F<inf>6</inf> doped with Eu<sup>3+</sup> ionscitations
- 2013Hydrothermal synthesis and structural and spectroscopic properties of the new triclinic form of GdBO<inf>3</inf>:Eu<sup>3+</sup> nanocrystalscitations
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article
Revised crystal structure and luminescent properties of gadolinium oxyfluoride Gd<inf>4</inf>O<inf>3</inf>F<inf>6</inf> doped with Eu<sup>3+</sup> ions
Abstract
<p>The structure of gadolinium oxyfluoride nanoparticles was revised. Extensive studies including X-ray diffraction and Rietveld refinement as well as Fourier transform infrared spectroscopy and Raman spectroscopy confirmed the monoclinic P12/c1 crystal structure of Gd<sub>4</sub>O<sub>3</sub>F<sub>6</sub>. Morphological analysis using transmission electron microscopy showed the nanocrystallinity of the materials prepared via the sol-gel Pechini's method. The luminescent properties of the prepared materials with different concentrations of Eu<sup>3+</sup> ions were characterized by emission spectroscopy. The phosphors obtained were investigated in the vacuum ultraviolet range using synchrotron radiation. The Judd-Ofelt parameters (Ω<sub>2</sub>, Ω<sub>4</sub>) and emission efficiencies η were calculated and are discussed in detail. This journal is © the Partner Organisations 2014.</p>