Coated manganese doped phosphors
US11060023B2 · kind B2 · utility
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12Claims
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Key dates
| Filing date | Aug 9, 2018 |
| Grant date | Jul 13, 2021 |
| Priority date | — |
| Expiry date | Aug 9, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K11/675
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A process for preparing a population of coated phosphor particles is presented. The process includes combining particles of a phosphor of formula I: Ax [MFy]:Mn4+ with a first solution including a compound of formula II: Ax[MFy] to form a suspension, where A is Li, Na, K, Rb, Cs, or a combination thereof; M is Si, Ge, Sn, Ti, Zr, Al, Ga, In, Sc, Hf, Y, La, Nb, Ta, Bi, Gd, or a combination thereof; x is an absolute value of a charge of the [MFy] ion; and y is 5, 6 or 7. The process further includes combining a second solution including a source A+ ions with the suspension.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.