INFRARED LUMINOPHOR OF COMPLEX ACTION BASED ON YTTRIUM ORTHOPHOSPHATE, ACTIVATED WITH IONS OF Yb3+ AND Er3+ Russian patent published in 2017 - IPC C09K11/78 C09K11/81 

FIELD: chemistry.

SUBSTANCE: invention relates to chemical industry. Infrared luminophor based on yttrium orthophosphate, activated with Er³⁺ ions, co-activated with Ce³⁺ ions and sensitised with Yb³⁺ ions, corresponds to following empirical formula: Y_1-x-y-z-d-cYb_xEr_yCe_zMe¹_dMe²_cPO₄, where Me¹ is one of ions of Group II elements of periodic table – Ca²⁺, Sr²⁺, Ba²⁺; Me² – one of ions of elements IV (Ti⁴⁺, Zr⁴⁺, Si⁴⁺) or V (Nb⁵⁺, Ta⁵⁺) of group of periodic table; 0.2≤x≤0.94; 0.001≤y≤0.10; 0.0001≤z≤0.01; 0.01≤d≤0.1; 0.005≤c≤0.05; x+y+z+d+c<1. Invention increases depth of photostimulated extinction of Stokes infrared luminescence in region of 0.96–1.04 mcm and 1.5–1.6 mcm without significant change in spectral composition of initial radiation during combined effect of exciting infrared radiation in area of 0.94–0.98 mcm and stimulating radiation in region of 0.30–0.75 mcm.

EFFECT: invention can be used in making articles for detecting modulated radiation of multispectral composition.

1 cl, 5 dwg, 1 tbl, 17 ex