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

US11932793B2 · kind B2 · utility

Assignees

• GRIREM ADVANCED MATERIALS CO., LTD. · CN
• GRIREM HI-TECH CO., LTD. · CN
• Rare Earth Functional Materials (Xiong'an) Innovation Center Co., Ltd. · CN

Inventors

• Ronghui Liu · Beijing, CN
• Shaowei Qin · Beijing, CN
• Yuanhong Liu · Beijing, CN
• Yanfeng Li · Beijing, CN
• Xiaoxia Chen · Beijing, CN
• Xiaole MA · Beijing, CN
• Yuan Xue · Beijing, CN

Key dates

• Filing date: May 19, 2022
• Grant date: Mar 19, 2024
• Expiry date: May 19, 2042

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02B20/00
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

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 rinner.