公开(公告)号：US11692135B2

公开(公告)日：2023-07-04

申请号：US17806442

申请日：2022-06-10

Applicant: NICHIA CORPORATION

Inventor： Shigeyuki Suzuki ,  Hiroyuki Watanabe ,  Shoji Hosokawa

IPC: C09K11/80 ,  C09K11/77 ,  B22F3/10

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

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：US11891556B2

公开(公告)日：2024-02-06

申请号：US18304004

申请日：2023-04-20

Applicant: NICHIA CORPORATION

Inventor： Shigeyuki Suzuki ,  Hiroyuki Watanabe ,  Shoji Hosokawa

IPC: B22F3/10 ,  C09K11/77

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

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：US11312900B2

公开(公告)日：2022-04-26

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 ,  C09K11/77

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：US10243113B2

公开(公告)日：2019-03-26

申请号：US15795444

申请日：2017-10-27

Applicant: NICHIA CORPORATION

Inventor： Shigeyuki Suzuki ,  Hiroyuki Watanabe ,  Shoji Hosokawa

IPC: H01L33/00 ,  H01L33/50 ,  C09K11/77 ,  H01L33/48 ,  H01L33/56 ,  H05B33/14

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.