Phosphors with narrow green emission

US10236422B1 · kind B1 · utility

Assignee

• EIE MATERIALS, INC. · US

Inventors

• Robert Nordsell · Lexington, US
• Evan Thomas · Lexington, US
• Yong Bok Go · Lexington, US
• Kristen Baroudi · Lexington, US
• Jonathan Melman · Lexington, US
• Yuming Xie · Beijing, CN

Key dates

• Filing date: May 25, 2018
• Grant date: Mar 19, 2019
• Expiry date: May 25, 2038

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10H20/854
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Green emitting phosphors have the empirical composition RE1−wAwMxEy, where RE may be one or more Rare Earth elements (for example, Eu or Gd), A may be one or more elements selected from the group Mg, Ca, Sr, or Ba, M may be one or more elements selected from the group Al, Ga, B, In, Sc, Lu or Y, E may be one or more elements selected from the group S, Se, O, or Te, w is greater than or equal to zero, or greater than or equal to 0.01, or greater than or equal to 0.05, and less than or equal to about 0.8, 2≤x≤4, and 4≤y≤7.