公开(公告)号：US20240336835A1

公开(公告)日：2024-10-10

申请号：US18627015

申请日：2024-04-04

Applicant: NICHIA CORPORATION

Inventor： Hiroshi OGASA ,  Hiroki INOUE ,  Kenichi AOYAGI

IPC: C09K11/06

CPC classification number: C09K11/06 ,  C09K2211/182

Abstract: An object of the present invention is to provide: a rare earth metal complex phosphor having an extended durability; and a method of producing such a rare earth metal complex phosphor; and the like. Provided is a method of producing a metal complex phosphor having an emission peak wavelength of 600 nm to 635 nm, the method comprising: preparing a ligand that is represented by Chemical Formula (I) and comprises two sets of azomethine groups, and dissolving this ligand in a first solvent to prepare a solution (1); preparing a rare earth metal complex that comprises a β-diketonato ligand represented by Chemical Formula (II) but does not comprise the ligand represented by Chemical Formula (I), and dissolving this rare earth metal complex in a second solvent to prepare a solution (2); mixing the solution (1) and the solution (2).

公开(公告)号：US20230295497A1

公开(公告)日：2023-09-21

申请号：US18040647

申请日：2021-08-05

Applicant: NICHIA CORPORATION

Inventor： Hiroshi OGASA ,  Shigeki YOSHIDA ,  Hiroyuki WATANABE

IPC: C09K11/77 ,  C01B21/06

CPC classification number: C09K11/77747 ,  C01B21/0602 ,  C01P2002/60 ,  C01P2002/50 ,  C01P2006/12 ,  C01P2004/61 ,  C01P2006/60 ,  C01P2004/03

Abstract: Provided is a method for producing a nitride phosphor. The method includes obtaining a first heat-treated product having a crystallite diameter of not less than 150 nm by subjecting a compound containing at least one rare-earth element selected from the group consisting of Y, La, Ce, Lu, and Gd to heat treatment at a temperature within a range of 800° C. to 1800° C.; and obtaining a second heat-treated product by subjecting a mixture containing the first heat-treated product and a raw material contained as required to heat treatment at a temperature within a range of 1200° C. to 1800° C. The raw material contains an M source containing at least one rare-earth element M selected from the group consisting of Y, Lu, and Gd; an La source; an Si source; and a Ce source. The mixture is prepared with the raw materials such that a fed composition is represented by a Formula of LawMxSi6Ny:Cez. In this Formula, w, x, y, and z satisfy 0.5≤w≤4.5, 0

公开(公告)号：US20200071606A1

公开(公告)日：2020-03-05

申请号：US16553263

申请日：2019-08-28

Applicant: NICHIA CORPORATION

Inventor： Naoto FUJIOKA ,  Tadayoshi YANAGIHARA ,  Keisuke SUZUKI ,  Hiroshi OGASA

IPC: C09K11/02 ,  C09K11/77

Abstract: Provided are a ceramic complex having high light emission intensity and a method for producing the same. Proposed is a ceramic complex, including a rare earth aluminate fluorescent material having a composition represented by the following formula (I) and an aluminum oxide, wherein the content of the aluminum oxide is 70% by mass or more, the content of Na is 7 ppm by mass or less, the content of Si is 5 ppm by mass or less, the content of Fe is 3 ppm by mass or less, and the content of Ga is 5 pm by mass or less, relative to the total amount of the rare earth aluminate fluorescent material having a composition represented by the following formula (I) and the aluminum oxide. (Lni-aCea)3Al5O12   (I) wherein Ln represents at least one element selected from the group consisting of Y, Gd, Lu, and Tb; and a satisfies 0