Phosphor with garnet structure and light-emitting device comprising the phosphor

Patent metadata

Field	Value
Publication number	US-11932793-B2
Application number	US-202217748789-A
Country	US
Kind code	B2
Filing date	May 19, 2022
Priority date	Jun 29, 2021
Publication date	Mar 19, 2024
Grant date	Mar 19, 2024

Abstract

The invention relates to a phosphor with garnet structure and a light-emitting device comprising the phosphor, wherein the phosphor includes the following components in percentage by weight: 38.47-45.19% of Y element, 9.49-22.09% of Al element, 2.06-24.31% of Ga element, 27.3-32.04% of O element, 0.43-1.46% of Ce element. In the phosphor particles, the shortest distance from the surface of one side of the particle to the surface of the opposite side through the centroid of the particle is defined as R, the longest distance is R1, and 5 μm≤R≤40 μm; any distance from the particle surface to the centroid is r, and 0<r<½R; and the space with the distance from the particle surface to the centroid direction being less than or equal to r is defined as r inner .

First claim

What is claimed is:

1. A phosphor with garnet structure, wherein the phosphor comprises the following components in percentage by weight: 38.47-45.19% of Y element, 9.49-22.09% of Al element, 2.06-24.31% of Ga element, 27.3-32.04% of O element and 0.43-1.46% of Ce element; the shortest distance from the surface of one side of the phosphor to the surface of the opposite side through the centroid of the phosphor is defined as R, 5 μm≤R≤40 μm;
any distance from the phosphor surface to the centroid is r, 0<r<½R; and the space with the distance from the phosphor surface to the centroid direction being less than or equal to r is defined as r inner , and the space with the distance from the phosphor surface to the centroid direction being greater than r is defined as r outer , whereat the ratio of the weight percentage of Ga elements in any unit volume in r outer to r inner is n, and 0≤n≤1.

2. The phosphor of claim 1 , wherein R of the phosphor is 10 μm≤R≤30 μm.

3. The phosphor with garnet structure of claim 2 , wherein the value range of r is, 0.5 μm≤r≤⅓R.

4. The phosphor with garnet structure of claim 3 , wherein the value range of n is, 0≤n≤0.5.

5. The phosphor of claim 1 , wherein the phosphor comprises, in percentage by weight, 40.6-45.2% of Y element, 10.9-21.9% of Al element, 2.2-19.8% of Ga element, 27.7-32% of O element, 0.67-1.2% of Ce element.

6. The phosphor of claim 5 , wherein R of the phosphor is 10 μm≤R≤30 μm.

7. The phosphor with garnet structure of claim 1 , wherein the peak wavelength thereof is 515 nm to 550 nm under excitation of blue light.

8. The phosphor with garnet structure of claim 5 , wherein the peak wavelength thereof is 515 nm to 550 nm under excitation of blue light.

9. The phosphor with garnet structure of claim 2 , wherein the peak wavelength thereof is 515 nm to 550 nm under excitation of blue light.

10. The phosphor with garnet structure of claim 3 , wherein the peak wavelength thereof is 515 nm to 550 nm under excitation of blue light.

11. The phosphor with garnet structure of claim 4 , wherein the peak wavelength thereof is 515 nm to 550 nm under excitation of blue light.

12. A light-emitting device, comprises the phosphor with garnet structure of claim 1 .

13. The light-emitting device of claim 12 , further comprising other phosphor, wherein the other phosphor comprises one or more of (Ca, Sr, Ba)AlSiN 3 :Eu, (Mg, Ca, Sr, Ba) 2 SiO 4 :Eu, (Ca, Sr) 3 SiO 5 :Eu, ZnS:Cu, ZnS:Ag, (Li, Na, K) 3 ZrF 7 :Mn, (Li, Na, K) 2 (Ti, Zr)F 6 :Mn, (Li, Na, K) 2 (Si, Ge)F 6 :Mn, (Ca, Sr, Ba)(Ti,Zr)F 6 :Mn, (Sr, Ca)S:Eu, Y 2 O 3 :Eu, (Sr, Ca, Ba, Mg) 5 (PO 4 ) 3 Cl:Eu, (Ca, Sr, Ba)MgAl 10 O 7 :Eu, (Ca, Sr, Ba) Si 2 O 2 N 2 :Eu.

14. The light-emitting device of claim 12 , wherein the phosphor comprises, in percentage by weight, 40.6-45.2% of Y element, 10.9-21.9% of Al element, 2.2-19.8% of Ga element, 27.7-32% of O element, 0.67-1.2% of Ce element.

15. The light-emitting device of claim 12 , wherein R of the phosphor is 10 μm≤R≤30 μm.

16. The light-emitting device of claim 15 , wherein the value range of r is, 0.5 μm≤r≤⅓R.

17. The light-emitting device of claim 16 , wherein the value range of n is, 0≤n≤0.5.

18. The light-emitting device of claim 12 , wherein the peak wavelength thereof is 515 nm to 550 nm under excitation of blue light.

Assignees

• Grirem Advanced Mat Co Ltd
• Grirem Hi Tech Co Ltd
• Rare Earth Functional Mat Xiongan Innovation Center Co Ltd

Inventors

• Liu Ronghui
• Qin Shaowei
• Liu Yuanhong
• Li Yanfeng
• Chen Xiaoxia
• Ma Xiaole
• Xue Yuan

Classifications

• H10H20/8513

  having two or more wavelength conversion materials · CPC title

• H10H20/8512

  Wavelength conversion materials · CPC title

• H10H20/8514

  characterised by their shape, e.g. plate or foil · CPC title

• C09K11/7774 Primary

  Aluminates · CPC title

• C09K11/02

  Use of particular materials as binders, particle coatings or suspension media therefor · CPC title