Nitride phosphors with interstitial cations for charge balance
US8951441B2 · kind B2 · utility
5Cited by
31References
24Claims
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Key dates
| Filing date | Dec 31, 2012 |
| Grant date | Feb 10, 2015 |
| Priority date | — |
| Expiry date | Feb 12, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K11/7731
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Phosphors comprising a nitride-based composition represented by the chemical formula: M(x/v)(M′aM″b)Si(c-x)AlxNd:RE, wherein: M is a divalent or trivalent metal with valence v; M′ is at least one divalent metal; M″ is at least one trivalent metal; 2a+3b+4c=3d; and RE is at least one element selected from the group consisting of Eu, Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm, Yb. Furthermore, the nitride-based composition may have the general crystalline structure of M′aM″bSicNd, where Al substitutes for Si within the crystalline structure and M is located within the crystalline structure substantially at the interstitial sites.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.