Orange-yellow silicate phosphor and warm white semiconductor using same
US7816663B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 5, 2008 |
| Grant date | Oct 19, 2010 |
| Priority date | — |
| Expiry date | Apr 21, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A silicate phosphor prepared from Mg2Me+20.5Ln3Si2.5O12-2yN−3yF−1y, in which Me+2=Ca, Sr, Ba, Ln=Sc, Lu, Er, Ho, excited by one single ion or an ion pair of d, f-elements such as Ak+n=Cu+1, Ce+3, Eu+2, Ag+1, Mn+2. The phosphor has a cubic garnet architecture prepared by solid phase synthesis, and radiates at green, green-yellow, yellow-orange spectrum regions. When mixed with (Y,Gd,Ce)3Al5O12 substrate-based phosphor, the compound mixture has warm white radiation and color temperature T<4000K with high luminous intensity and high luminescence efficiency. The invention also provides a warm white semiconductor using the silicate phosphor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.