公开(公告)号：US20230250335A1

公开(公告)日：2023-08-10

申请号：US18304004

申请日：2023-04-20

Applicant: NICHIA CORPORATION

Inventor： Shigeyuki SUZUKI ,  Hiroyuki WATANABE ,  Shoji HOSOKAWA

IPC: C09K11/77 ,  B22F3/10

CPC classification number: C09K11/77348 ,  C09K11/7731 ,  C09K11/7739 ,  C09K11/77346 ,  C09K11/77347 ,  B22F3/1017

Abstract: A nitride phosphor having a composition containing Eu, Si, Al, N, and a group 2 element including at least one selected from the group consisting of Mg, Ca, Sr, and Ba. In the composition, a ratio of a total molar content of the group 2 element and Eu to a molar content of Al is 0.8 or more and 1.1 or less, a molar ratio of Eu is 0.002 or more and 0.08 or less, a molar ratio of Si is 0.8 or more and 1.2 or less, and a total molar ratio of Si and Al is 1.8 or more and 2.2 or less. The nitride phosphor has a first peak in a range of 17° 2θ or more and 19° 2θ or less and a second peak in a range of 34° 2θ or more and 35.5° 2θ or less in a CuKα powder X-ray diffraction pattern.

公开(公告)号：US20230235223A1

公开(公告)日：2023-07-27

申请号：US18154147

申请日：2023-01-13

Applicant: NICHIA CORPORATION

Inventor： Shigeki YOSHIDA ,  Takayuki SHINOHARA ,  Hiroyuki WATANABE

IPC: C09K11/77 ,  G03B21/20

CPC classification number: C09K11/77747 ,  G03B21/204

Abstract: Provided is a fluorescent material with high brightness. The fluorescent material includes a nitride fluorescent material comprising La, Ce, Si, and N; and a first phosphorus compound disposed on a surface of the nitride fluorescent material. The first phosphorus compound includes at least one selected from the group consisting of lanthanum phosphate, lanthanum hydrogen phosphate, and hydrates thereof. A content of phosphorus atoms in the fluorescent material is 0.07% by mass or higher and 0.8% by mass or lower.

公开(公告)号：US20200255728A1

公开(公告)日：2020-08-13

申请号：US16783630

申请日：2020-02-06

Applicant: NICHIA CORPORATION

Inventor： Hiroyuki WATANABE ,  Shigeyuki SUZUKI ,  Shoji HOSOKAWA

IPC: C09K11/08 ,  C09K11/02

Abstract: A method for producing a nitride fluorescent material includes preparing fluorescent material core particles having a composition containing Sr, Ca, Eu, Al, Si, and N, in which, when a molar ratio of Al in the composition is 1, a molar ratio of Sr is in a range of 0.45 or more and 1.1 or less, a molar ratio of Ca is in a range of more than 0 and less than 0.55, a molar ratio of Eu is in a range of more than 0 and 0.033 or less, a total molar ratio of Sr, Ca, and Eu is 1.1 or less, a molar ratio of Si is in a range of 0.81 or more and 1.21 or less, and a molar ratio of N is in a range of 2.25 or more and 3.85 or less, subjecting them to a first heat treatment and a second heat treatment.

公开(公告)号：US20180194999A1

公开(公告)日：2018-07-12

申请号：US15916938

申请日：2018-03-09

Applicant: NICHIA CORPORATION

Inventor： Kazuya NISHIMATA ,  Hiroyuki WATANABE ,  Shoji HOSOKAWA

IPC: C09K11/77 ,  H01L33/50 ,  H01L33/62 ,  H01L33/56 ,  C09K11/08 ,  H01L33/48 ,  H01L33/32

Abstract: A method for producing a nitride fluorescent material having high emission luminance can be provided. The method includes heat-treating a raw material mixture containing silicon nitride, silicon, an aluminium compound, a calcium compound, and a europium compound.

公开(公告)号：US20180123000A1

公开(公告)日：2018-05-03

申请号：US15795444

申请日：2017-10-27

Applicant: NICHIA CORPORATION

Inventor： Shigeyuki SUZUKI ,  Hiroyuki WATANABE ,  Shoji HOSOKAWA

IPC: H01L33/50 ,  C09K11/77 ,  H05B33/14 ,  H01L33/56 ,  H01L33/48

CPC classification number: H01L33/502 ,  C09K11/7734 ,  C09K11/7774 ,  H01L33/486 ,  H01L33/56 ,  H01L2224/32245 ,  H01L2224/48091 ,  H01L2224/48247 ,  H01L2224/48257 ,  H01L2224/73265 ,  H05B33/14 ,  H01L2924/00

Abstract: Provided is a light emitting device which includes a light emitting element having a peak emission wavelength in a range of 400 nm to 500 nm, and a fluorescent member containing a fluorescent material having a peak emission wavelength in a range of 630 nm to 670 nm, and a composition represented by the formula. CasSrtEuuSivAlwNx. In the formula, s, t, u, v, w, and x satisfy 0.25≤s≤0.5, 0.4≤t≤0.75, 0.01≤u≤0.04, 0.8≤s+t+u≤1.1, 0.8≤v≤1.2, 0.8≤w≤1.2, 1.8≤v+w≤2.2, and 2.5≤x≤3.2. The light emitting device emits light having an x value of CIE 1931 chromaticity coordinates of 0.640 or more.

公开(公告)号：US20180057738A1

公开(公告)日：2018-03-01

申请号：US15682987

申请日：2017-08-22

Applicant: NICHIA CORPORATION

Inventor： Hiroyuki WATANABE ,  Shoji HOSOKAWA

IPC: C09K11/77 ,  C09K11/08 ,  H01L33/50

CPC classification number: C09K11/7734 ,  C09K11/0883 ,  H01L33/502 ,  H01L33/504

Abstract: Provided is a method of producing a nitride fluorescent material containing silicon nitride particles containing Eu, at least one alkaline earth metal selected from the group consisting of Mg, Ca, Sr, and Ba, Al, and fluorine in a composition of the silicon nitride particles. The method includes heat treating a raw material mixture containing an Eu source, a source of the alkaline earth metal, an Al source, an Si source, and an alkaline earth metal fluoride containing at least one selected from the group consisting of Mg, Ca, Sr, and Ba, wherein a molar content ratio of fluorine atom to Al is from 0.02 to 0.3.

公开(公告)号：US20150214444A1

公开(公告)日：2015-07-30

申请号：US14608191

申请日：2015-01-29

Applicant: NICHIA CORPORATION

Inventor： Hiroyuki WATANABE ,  Shoji HOSOKAWA

IPC: H01L33/50 ,  C09K11/77

CPC classification number: H01L33/502 ,  C09K11/7734 ,  C09K11/7774 ,  H01L2224/32245 ,  H01L2224/48091 ,  H01L2224/48247 ,  H01L2224/48257 ,  H01L2224/73265 ,  Y10T428/2982 ,  H01L2924/00014 ,  H01L2924/00

Abstract: A phosphor for absorbing light in a region from ultraviolet to visible light and emitting light whose emission peak wavelength being in a range of 600 nm to 650 nm, represented by general formula shown below, and having a difference between the emission peak wavelength and a half width being larger than 543 nm. SrtCavEuwAlxSiyNz (in which, 0.5≦t

Abstract translation: 一种用于吸收从紫外线到可见光的区域中的光的荧光体，发射发光峰值波长在600nm〜650nm范围内的光，由下述通式表示，并且具有发光峰值波长与半 宽度大于543nm。 SrtCavEuwAlxSiyNz（其中，0.5＆nlE; t <1,0

公开(公告)号：US20200172805A1

公开(公告)日：2020-06-04

申请号：US16779642

申请日：2020-02-02

Applicant: NICHIA CORPORATION

Inventor： Hiroyuki WATANABE ,  Shoji HOSOKAWA

IPC: C09K11/77 ,  H01L33/50 ,  C09K11/08

Abstract: Provided is a method of producing a nitride fluorescent material containing silicon nitride particles containing Eu, at least one alkaline earth metal selected from the group consisting of Mg, Ca, Sr, and Ba, Al, and fluorine in a composition of the silicon nitride particles. The method includes heat treating a raw material mixture containing an Eu source, a source of the alkaline earth metal, an Al source, an Si source, and an alkaline earth metal fluoride containing at least one selected from the group consisting of Mg, Ca, Sr, and Ba, wherein a molar content ratio of fluorine atom to Al is from 0.02 to 0.3.