Lutetium nitride-based phosphor and light emitting device comprising same

US11066600B2 · 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: Jul 20, 2021
• Expiry date: Oct 10, 2037

Classification

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

Abstract

A lutetium nitride-based phosphor and a light emitting device comprising the same, wherein the lutetium nitride-based phosphor comprises an inorganic compound, and the composition of the inorganic compound comprises at least an M element, an A element, a D element and an R element; the M element is one or two elements selected from a group consisting of Lu, La, Pr, Nd, Sm, Y, Tb and Gd, and necessarily comprises Lu; the A element is Si and/or Ge; the D element is one or two elements selected from a group consisting of O, N and F, and necessarily comprises N; the R element is Ce and/or Dy, and the atomic molar ratio of the Lu element in the M element is greater than 50%. Because the ion radius of Lu3+ is smaller than the ion radius of La3+, the light color performance thereof can be flexibly adjusted according to needs.