Geodesic
Highly dispersed anti-Stokes phosphors based on KGd$_2$F$_7$:Yb,Er single-phase solid solutions
Nanosistemy: fizika, himiâ, matematika, Tome 15 (2024) no. 5, pp. 702-709 Cet article a éte moissonné depuis la source Math-Net.Ru

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The possibility of doping the KGd$_2$F$_7$ matrix with ytterbium and erbium ions by introducing yttrium ions with a concentration of 25 mol.% was confirmed and the conditions were determined for the synthesis of anti-Stokes phosphors based on single-phase KGd$_2$F$_7$:Yb,Er solid solutions. The dependences were revealed of the sizes of coherent scattering regions, crystal lattice parameters, and energy yield of luminescence on the temperature and duration of heat treatment. Heat treatment conditions were determined to ensure the achievement of intense anti-Stokes luminescence. As a result, effective phosphors KGd$_2$F$_7$:Yb (20.0 mol.%),Er (4.0 mol.%) with an energy yield of up-conversion luminescence of 3.80% were developed. Disordering of the crystal structure (transition from cubic to tetragonal modification) at a temperature of 600$^\circ$C was recorded, corresponding to the rule of Ostwald steps.
Keywords: inorganic fluorides, anti-Stokes luminescence, KGd$_2$F$_7$
Mots-clés : co-precipitation technique, ytterbium, erbium. 
@article{NANO_2024_15_5_a13,
     author = {Anna S. Zakharova and Sergey V. Kuznetsov and Alexander A. Alexandrov and Daria V. Pominova and Valery V. Voronov and Pavel P. Fedorov and Vladimir K. Ivanov},
     title = {Highly dispersed {anti-Stokes} phosphors based on {KGd}$_2${F}$_7${:Yb,Er} single-phase solid solutions},
     journal = {Nanosistemy: fizika, himi\^a, matematika},
     pages = {702--709},
     year = {2024},
     volume = {15},
     number = {5},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/NANO_2024_15_5_a13/}
}
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%A Anna S. Zakharova
%A Sergey V. Kuznetsov
%A Alexander A. Alexandrov
%A Daria V. Pominova
%A Valery V. Voronov
%A Pavel P. Fedorov
%A Vladimir K. Ivanov
%T Highly dispersed anti-Stokes phosphors based on KGd$_2$F$_7$:Yb,Er single-phase solid solutions
%J Nanosistemy: fizika, himiâ, matematika
%D 2024
%P 702-709
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Anna S. Zakharova; Sergey V. Kuznetsov; Alexander A. Alexandrov; Daria V. Pominova; Valery V. Voronov; Pavel P. Fedorov; Vladimir K. Ivanov. Highly dispersed anti-Stokes phosphors based on KGd$_2$F$_7$:Yb,Er single-phase solid solutions. Nanosistemy: fizika, himiâ, matematika, Tome 15 (2024) no. 5, pp. 702-709. http://geodesic.mathdoc.fr/item/NANO_2024_15_5_a13/