Charge compensated nitride phosphors for use in lighting applications
US7262439B2 · kind B2 · utility
94Cited by
1References
19Claims
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Key dates
| Filing date | Nov 22, 2005 |
| Grant date | Aug 28, 2007 |
| Priority date | — |
| Expiry date | Nov 22, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K50/125
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Disclosed are phosphor compositions having the formulas Ca1−a−bCeaEubAl1+aSi1−aN3, where 0<a≦0.2, 0≦b≦0.2; Ca1−c−dCecEudAl1−c(Mg,Zn)cSiN3, where 0<c≦0.2, 0≦d≦0.2; Ca1−2e−fCee(Li,Na)eEufAlSiN3, where 0≦e≦0.2, 0≦f≦0.2, g+h>0; and Ca1−g−h−iCeg(Li,Na)hEuiAl1+g−hSi1−g+hN3 where 0≦g≦0.2, 0<h≦0.4, 0≦i≦0.2,g+i>0. When combined with radiation from a blue or UV light source, these phosphors can provide light sources with good color quality having high CRI over a large color temperature range. Also disclosed are blends of the above phosphors and additional phosphors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.