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

FIELD: chemistry.

SUBSTANCE: infrared (IR) complex acting phosphor based on yttrium and lanthanum oxysulfides, activated by Nd³⁺ ions and co-activated by Pr³⁺ ions, has a composition corresponding to the following empirical formula: (Ln_1-x-y-z-d-cGd_xNd_yPr_zMe¹_dMe²_c)₂O₂S, where Ln - is one of Y³⁺, La³⁺ ions; Me¹ is one of the Periodic System group II elements - Ca²⁺, Sr²⁺, Ba²⁺; Me² is one of the Periodic System group IV elements - (Ti⁴⁺, Zr⁴⁺, Si⁴⁺) or one of the Periodic System group V elements - (Nb⁵⁺, Ta⁵⁺); 0<x≤0.820; 0.005≤y≤0.025; 0.00001≤z≤0.005; 0.01≤d≤0.1; 0.005≤c≤0.05.

EFFECT: invention enables to increase the photostimulated quenching of Stokes IR luminescence of the mentioned ions in ranges of 0,86-0,95 mcm, 1,03-1,12 mcm and 1,3-1,45 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