Blue phosphor, light-emitting device, and plasma display panel
US8040063B2 · kind B2 · utility
4Cited by
2References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 25, 2008 |
| Grant date | Oct 18, 2011 |
| Priority date | — |
| Expiry date | Mar 25, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/44
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention provides a blue phosphor that exhibits high luminance and shows less luminance degradation during driving of a light-emitting device. The present invention is a blue phosphor represented by the general formula aBaO.bSrO.(1−a−b)EuO.cMgO.dAlO3/2.eWO3, where 0.70≦a≦0.95, 0≦b≦0.15, 0.95≦c≦1.15, 9.00≦d≦11.00, 0.001≦e≦0.100, and a+b≦0.97 are satisfied. In this blue phosphor, two peaks whose tops are located in a range of diffraction angle 2θ=13.0 to 13.6 degrees are present in an X-ray diffraction pattern obtained by measurement on the blue phosphor using an X-ray with a wavelength of 0.774 Å.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.