Physics of the Solid State
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Spectral and structural characteristics of β-NaGd1-xEuxF4 at different concentrations of Eu3+ ions
Kiselev A. P.
1, Kedrov V. V.
1, Zaitsev S. V.
1, Zver'kova I. I.
1, Fursova T. N.
1, Barkalov O. I.
1, 1
1Institute of Solid State Physics, Russian Academy of Sciences, Chernogolovka, Moscow region, Russia
Email: kiselev@issp.ac.ru, kedr@issp.ac.ru, szaitsev@issp.ac.ru, zverkova@issp.ac.ru, fursova@issp.ac.ru, barkalov@issp.ac.ru
Samples of β-NaGd1-xEuxF4, where 0≤ x≤1, were synthesized by the hydrothermal method for the first time. The obtained materials are characterized by methods of X-ray phase analysis, electron microscopy, IR and Raman spectroscopy. For the first time, luminescence spectra and luminescence excitation spectra of β-NaGd1-xEuxF4 were studied in the entire range of europium concentrations. The absence of complete quenching of the luminescence of the β-NaGd1-xEuxF4 system was found and it was shown that the excitation of the luminescence of this system by excitation of donor ions (Gd3+) leads to a high quantum yield of luminescence. Keywords: phosphors for LEDs, rare earth orthoborates, X-ray diffraction analysis, IR and Raman spectroscopy, luminescence spectra.
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