LUMINESCENT MATERIAL FOR SOLID-STATE WHITE LIGHT SOURCES (VERSIONS) Russian patent published in 2012 - IPC C09K11/78 H01L33/26 C09K11/80 

FIELD: chemistry.

SUBSTANCE: luminescent material according to the first version has general formula [Y_1-x-y-zCe_xΣ(Ln-1)_yΣ(Ln-2)_z]_3-α(Al_1-p-qGa_pIn_q)₅O_12-1,5-α where: 0.2≤α≤2.0; 0.001<x<0.15; Σ (Ln-l)_y denotes one or more lanthanides selected from Gd, Tb, La, Lu, Sm; 0<y<0.90; Σ (Ln-2)_z denotes one or more lanthanides selected from Pr, Nd, Dy; 0.0001<z<0.01, 0<p<0.3 and 0<q<0,3. Values of x, y and z are such that 1-x-y-z>0. The value (3-α) ranges from 1.67 to 2.8. The luminescent material can be a composition consisting of two phases, one of which has said composition and the other is aluminium oxide. According to the second version, the luminescent material does not contain Ga, In. According to the third version, the luminescent material does not contain Ga, In and Σ(Ln-2).

EFFECT: obtained luminescent materials enable to vary the colour temperature of a solid-state white light source based on blue-light-emitting diodes from 2500-15000 K.

15 cl, 2 tbl, 1 dwg, 28 ex