Green emitting phosphor for use in UV light emitting diodes
US6469322B1 · kind B1 · utility
106Cited by
9References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 30, 2000 |
| Grant date | Oct 22, 2002 |
| Priority date | — |
| Expiry date | May 30, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A green-emitting phosphor is provided, which has the general formula LnxBO3: Ce3+y, Tb3+z, where Ln includes one or more lanthanide-type elements, such as Sc, Y, La, Gd, and Lu. x+y+z=1; 0≦x≦0.98; 0≦y≦0.5; and 0≦z≦0.5. The phosphor efficiently converts light in the UV/blue region of the spectrum (250-400 nm) to light of longer wavelength, with a peak emission intensity of about 545 nm. The phosphor is used alone, or in a phosphor blend for converting UV/blue light from a GaN-base light emitting diode to green or white light, respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.