US 12,305,100 B2
Method for producing fluoride phosphor
Masato Yoshida, Tokushima (JP)
Assigned to NICHIA CORPORATION, Anan (JP)
Filed by NICHIA CORPORATION, Anan (JP)
Filed on Jun. 29, 2022, as Appl. No. 17/809,709.
Claims priority of application No. 2021-110955 (JP), filed on Jul. 2, 2021.
Prior Publication US 2023/0018663 A1, Jan. 19, 2023
Int. Cl. C09K 11/64 (2006.01); C01B 33/10 (2006.01); C09K 11/61 (2006.01); C09K 11/77 (2006.01)
CPC C09K 11/646 (2013.01) [C01B 33/103 (2013.01); C09K 11/617 (2013.01); C09K 11/77348 (2021.01)] 19 Claims
OG exemplary drawing
 
1. A method for producing a fluoride phosphor, comprising:
providing a first solution containing an element M1 containing at least one selected from the group consisting of group 13 elements, manganese, and fluorine, a second solution containing an element M2 containing at least one selected from the group consisting of group 4 elements and group 14 elements, and a third solution containing at least one selected from the group consisting of alkali metal elements; and
adding the second solution and the third solution to the first solution to obtain a first fluoride phosphor,
wherein a time period for adding the second solution to the first solution overlaps with a time period for adding the third solution to the first solution,
wherein the second solution and the third solution are added independently to the first solution, and
wherein the fluoride phosphor does not contain Na in the composition.