Phosphor, process for producing the same, and luminescent device
US8147715B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 7, 2006 |
| Grant date | Apr 3, 2012 |
| Priority date | — |
| Expiry date | Oct 21, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/8512
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A green phosphor for emitting light, a spectrum of which is sharp, in an ultraviolet and visible light region, which has higher green light brightness than the conventional rare earth-activated sialon phosphor and has higher durability than the conventional oxide phosphor, is provided. The phosphor being characterized in that Al and a metal element M (here, M is Eu) are incorporated into a crystal of a nitride or oxynitride having a β-type Si3N4 crystal structure as a solid solution, the content of oxygen in the crystal does not exceed 0.8% by mass, and the phosphor emits a visible light having a luminescence peak wavelength in the range of 450 nm to 650 nm upon exposure to an excitation source is provided. This luminescence spectrum has a sharp spectrum shape. A manufacturing method of the phosphor, a lighting device and an image display device utilizing the phosphor are also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.