Red-emitting nitride-based calcium-stablized phosphors
US9260659B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 3, 2013 |
| Grant date | Feb 16, 2016 |
| Priority date | — |
| Expiry date | Apr 22, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/851
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Red-emitting phosphors may comprise a nitride-based composition represented by the chemical formula MaSrbSicAldNeEuf, wherein: M is at least one of Mg, Ca, Sr, Ba, Y, Li, Na, K and Zn, and 0<a<1.0; 1.5<b<2.5; 4.0≦c≦5.0; 0≦d≦1.0; 7.5<e<8.5; and 0<f<0.1; wherein a+b+f>2+d/v and v is the valence of M. Furthermore, nitride-based red-emitting phosphor compositions may be represented by the chemical formula MxM′2Si5-yAlyN8:A, wherein: M is Mg, Ca, Sr, Ba, Y, Li, Na, K and Zn, and x>0; M′ is at least one of Mg, Ca, Sr, Ba, and Zn; 0≦y≦0.15; and A is at least one of Eu, Ce, Tb, Pr, and Mn; wherein x>y/v and v is the valence of M, and wherein the red-emitting phosphors have the general crystalline structure of M′2Si5N8:A.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.