INFRARED COMPLEX ACTING PHOSPHOR BASED ON YTTRIUM, LANTHANUM, GADOLINIUM OXYSULFIDES, ACTIVATED BY ErIONS Russian patent published in 2017 - IPC C09K11/84 

FIELD: chemistry.

SUBSTANCE: infrared (IR) complex acting phosphor based on yttrium oxysulfide, activated by Er³⁺ ions and co-activated by Ce³⁺ ions, has a composition corresponding to the following empirical formula: , where Ln is one of La⁺³, 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 (Nb⁵⁺, Ta⁵⁺) elements of the Periodic System; 0<x≤0.6425; 0.05≤y≤0.2; 0.00005≤z≤0.0025; 0.01≤d≤0.1; 0.005≤c≤0.05.

EFFECT: invention allows to increase the photostimulated quenching of Stokes IR ions luminescence without significant changes to the initial radiation source spectral composition, under the combined action of exciting IR radiation in ranges of 0,79-0,82 micrometers or 1,50-1,55 micrometers, and stimulating radiation in the range of 0,30-0,75 micrometers.

4 dwg, 1 tbl, 17 ex