CRYSTAL MATERIAL FOR PHOSPHORS FOR WHITE LIGHT LEDS Russian patent published in 2022 - IPC C30B9/04 C30B29/12 C09K11/55 C09K11/63 C09K11/86 F21V9/30 F21Y115/10 

FIELD: chemical industry.

SUBSTANCE: invention relates to the chemical industry and can be used in the manufacture of white light LEDs. The crystalline material is a phosphor based on borate fluoride with an "anti-zeolite" structure of the general formula Ba₁₂(BO₃)₆[BO₃][LiF₄], in the framework [Ba₁₂(BO₃)₆]⁶⁺ of which barium ions are isomorphically replaced by ions of rare earth elements: europium, terbium and cerium. The specified luminophore is obtained by the method for temperature reduction from a high-temperature solution-melt of the initial components of the composition, mol. %: BaO:BaF₂:B₂O₃:Li₂O=24:22:34:20 containing oxides of rare earth elements, wt. %: 0.13-0.30 Eu₂O₃; 0.10-0.30 Tb₂O₃; 0.13-0.50 Ce₂O₃. When the resulting single-phase phosphor is excited by radiation in the ultraviolet region of 300-370 nm at a temperature of 77-300 K, multiband luminescence is provided, close to white light.

EFFECT: by changing the content of rare earth elements, it is possible to vary the shades of the emitted white light.

1 cl, 3 dwg, 2 tbl, 2 ex