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

FIELD: chemistry.

SUBSTANCE: infrared (IR) complex acting phosphor based on yttrium oxysulfide, activated by Tm³⁺ ions, has a composition corresponding to the following empirical formula: (Y_1-x-y-z-dLn_xTm_yMe¹_zMe²_d)₂O₂S, 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 the Periodic System group IV elements - (Ti⁴⁺, Zr⁴⁺, Si⁴⁺) or one of the ions of the Periodic System group V elements - (Nb⁵⁺, Ta⁵⁺); 0<x<0,80; 0.0025≤y<0.05; 0.01≤z<0.1; 0.005≤d<0.05.

EFFECT: invention enables to increase the depth of photostimulated quenching of Stokes IR band luminescence of the mentioned ions in ranges of 1,36-1,52 mcm and 1,65-1,98 mcm without significant changes to the initial radiation source spectral composition, under the combined action of exciting IR radiation in the range of 0,79-0,82 mcm and stimulating radiation in the range of 0,30-0,75 mcm.

4 dwg, 1 tbl, 17 ex