NEW PHOSPHORS, SUCH AS NEW RED-EMITTING LINE-EMISSION PHOSPHORS, FOR SOLID SOURCE OF LIGHT Russian patent published in 2018 - IPC C09K11/08 C09K11/77 H01L33/26 

FIELD: lighting.

SUBSTANCE: lighting device 100 includes a light source 10 and a luminescent material 20 converting at least a portion of the emition 11 from the source 10 to emition 51. Source 10 includes a light emitting diode. Luminescent material 20 includes phosphor 40 having structure of UCr₄C₄, or an ordered version of UCr₄C₄ aristotype, or structure NaLi₃SiO₄ or structure KLi₃GeO₄ having the formula: M_1-x-y-zZ_zA_aB_bC_cD_dE_eN_4-nO_n: ES_x, RE_y (I), in which M is selected from the group consisting of Ca, Sr, and Ba; Z, is selected from the group consisting of Na, K and Rb; A is selected from the group consisting of Mg, Zn and Cd; B is selected from the group consisting of B, Al and Ga; C is selected from the group consisting of tetravalent Si, Ge, Ti, and Hf; D is selected from the group consisting of monovalent Li and Cu; E, is selected from the group consisting of P, V, Nb and Ta; ES is selected from the group consisting of divalent Eu, Sm and Yb; RE, is selected from the group consisting of trivalent Ge, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er and Tm; 0≤x≤0.2; 0≤y≤0.2; 0≤x+y≤0.4; 0≤z<1; 0≤n≤0.5; 0≤a≤4; 0≤b≤4; 0≤c≤4; 0≤d≤4; e=0; a+b+c+d+e=4; 2a+3b+4c+d+5e=10-y-n+z. Phosphor particles may have a coating of the group consisting of AlPO₄-coating, Al₂O₃-coating or SiO₂-coating. The luminescent material 20 may further include phosphores selected from Ba_0.95Sr_0.05Mg₂Ga₂N₄:Eu, BaMg₂Ga₂N₄:Eu, SrMg₃SiN₄:Eu, SrMg₂Al₂N₄:Eu, SrMg₂Ga₂N₄:Eu, BaMg₃SiN₄:Eu, CaLiAl₃N₄:Eu, SrLiAl₃N₄:Eu, CaLi_0.5MgAl_2.5N₄:Eu and SrLi_0.5MgAl_2.5N₄:Eu.

EFFECT: coefficient of efficiency and light output of lighting device are increased.

17 cl, 13 dwg, 4 tbl