公开(公告)号：US11965123B2

公开(公告)日：2024-04-23

申请号：US17442653

申请日：2020-03-19

Applicant: STELLA CHEMIFA CORPORATION

Inventor： Hiroaki Takatori ,  Shinya Kumazawa ,  Tetsuya Arakawa ,  Tetsuo Nishida

IPC: C09K11/61 ,  C01B33/10 ,  C09K11/02

CPC classification number: C09K11/617 ,  C01B33/103 ,  C09K11/025 ,  C01P2002/54 ,  C01P2004/80

Abstract: A red phosphor that has optical characteristics and durability under high-temperature and high-humidity environments, and a method for producing the same. The red phosphor includes a Mn-activated complex fluoride represented by the following general formula (1) and bismuth:

A2MF6:Mn4+  (1)

wherein A represents at least one alkali metal element selected from the group consisting of lithium, sodium, potassium, rubidium and cesium, and M represents at least one tetravalent element selected from the group consisting of silicon, germanium, tin, titanium, zirconium and hafnium.

公开(公告)号：US20240376379A1

公开(公告)日：2024-11-14

申请号：US18691203

申请日：2022-08-10

Applicant: STELLA CHEMIFA CORPORATION

Inventor： Kenta Horigami ,  Hiroaki Takatori ,  Shinya Kumazawa ,  Kazutaka Hirano ,  Tetsuya Arakawa ,  Tetsuo Nishida ,  Yusuke Kitahara

IPC: C09K11/61 ,  C09K11/02

Abstract: A red phosphor excellent in optical characteristics and durability in a high-temperature and high-humidity environment and a method for producing the same are provided. The red phosphor according to the present invention includes: a Mn-activated composite fluoride represented by a general formula (1); and a perovskite compound represented by a general formula (2): L2MF6:Mn4+ (1) where L represents at least one alkali metal element selected from a group consisting of sodium, potassium, etc., and M represents at least one tetravalent element selected from a group consisting of silicon, germanium, etc.; and ABX3 (2) where A represents at least one selected from a group consisting of sodium, potassium, etc., B represents at least one element selected from a group consisting of magnesium, calcium, etc., and X represents at least one element selected from a group consisting of fluorine, chlorine, bromine, iodine, and sulfur.