Phosphor, preparation method for phosphor, and light emitting device having phosphor

US11098249B2 · kind B2 · utility

Assignee

• GRIREM ADVANCED MATERIALS CO., LTD. · CN

Inventors

• Ronghui Liu · Beijing, CN
• Weidong Zhuang · Beijing, CN
• Fu Du · Beijing, CN
• Yuanhong Liu · Beijing, CN
• Wei Gao · Shanghai, CN
• Xia Zhang · Beijing, CN
• Huibing Xu · Beijing, CN
• Chunpei Yan · Beijing, CN
• Xiaowei Zhang · Union, US

Key dates

• Filing date: Jun 30, 2017
• Grant date: Aug 24, 2021
• Expiry date: Mar 6, 2038

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10H20/8512
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Phosphor, a preparation method for the phosphor, and a light emitting device having the phosphor. The phosphor comprises an inorganic compound which at least comprises an element M, an element A, an element D, and an element R; the element M is one or two elements selected from the group consisting of Lu, La, Pr, Nd, Sm, Y, Tb, and Gd and must comprise Lu; the element A is Si and/or Ge; the element D is one or two elements selected from the group consisting of O, N, and F and must comprise N; the element R is Ce and/or Dy. Since the ionic radius of Lu3+ is smaller than that of La3+, when the inorganic compound comprises element Lu, the original ligand site would be contracted. In order to reduce lattice distortion due to the ligand site contraction, the adjacent ligand site expands, and the photochromic property is adjusted.