Green emitting phosphor
US4749513A · kind A · utility
2Cited by
5References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 2, 1987 |
| Grant date | Jun 7, 1988 |
| Priority date | — |
| Expiry date | Oct 2, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K11/7772
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An efficient green emitting phosphor results from the coactivation of yttrium fluoride with gadolinium and erbium. The excitation energy absorbed by the Gd.sup.3+ centers is transferred non-radiatively to minority Er.sup.3+ centers, whose emission produces green light when excited by 275 nanometer or 378 nanometer radiation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.