COMPLEX ACTING PHOSPHOR BASED ON RARE EARTH ELEMENTS OXYSULFIDE ACTIVATED BY HoAND YbIONS Russian patent published in 2017 - IPC C09K11/84 

FIELD: chemistry.

SUBSTANCE: complex acting phosphorbased on the rare earth elements oxysulfides, activated by Ho³⁺ ions and sensitized by Yb³⁺ ions, has a chemical composition corresponding to the following empirical formula: , where Ln is one of Y³⁺, La³⁺, Gd³⁺ ions; Me¹ is one of the ions of the Periodic System group II elements - Ca2⁺, Sr²⁺, Ba²⁺; Me² is one of the ions of groups IV (Ti⁴⁺, Zr⁴⁺, Si⁴⁺), or V (Nb^5+, Ta⁵⁺) elements of the Periodic System; 0.01≤x≤ 0.2; 0.0005≤y≤0.01; 0.01≤d≤0.1; 0,005≤c≤0.05.

EFFECT: invention allows to increase the photostimulated quenching of visible anti-Stokes luminescence without significant changes to the initial radiation source spectral composition at single-photon excitation by IR radiation in the range of 0,94-0,98 microns.

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