Stabilized fluoride phosphor for light emitting diode (LED) applications
US11251342B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 19, 2020 |
| Grant date | Feb 15, 2022 |
| Priority date | — |
| Expiry date | Apr 8, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/84
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A stabilized fluoride phosphor for light emitting diode (LED) applications includes a particle comprising manganese-activated potassium fluorosilicate and an inorganic coating on each of the particles. The inorganic coating comprises a silicate. A method of making a stabilized fluoride phosphor comprises forming a reaction mixture that includes particles comprising a manganese-activated potassium fluorosilicate; a reactive silicate precursor; a catalyst; a solvent; and water in an amount no greater than about 10 vol. %. The reaction mixture is agitated to suspend the particles therein. As the reactive silicate precursor undergoes hydrolysis and condensation in the reaction mixture, an inorganic coating comprising a silicate is formed on the particles. Thus, a stabilized fluoride phosphor is formed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.