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

FIELD: chemistry.

SUBSTANCE: infrared (IR) phosphor based on yttrium oxysulfide, activated by Yb³⁺ ions corresponds to the following empirical formula: , where Ln is one of 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 (Nb⁵⁺, Ta⁵⁺) elements of the Periodic System; 0<x<0.65; 0.05≤y <0.2; 0.01≤z<0.1; 0.005≤d<0.05.

EFFECT: increased Stokes IR luminescence in the area of 0,94-0,98 microns of the known phosphor based on yttrium oxysulfide.

1 tbl, 4 dwg, 17 ex