Phosphor and application therefor
US10519370B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 16, 2015 |
| Grant date | Dec 31, 2019 |
| Priority date | — |
| Expiry date | Dec 16, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/8512
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An object of the present invention is to provide a red phosphor, a light emitting element using the phosphor, and a light emitting device using the light emitting element. A phosphor represented by the general formula: Cax+yEuySiAlN3 in which x+y is 1.0 or more and 1.1 or less, y is 0.004 or more and 0.012 or less, the phosphor being activated with Eu, and some of the Ca element(s) being substituted with the Eu element(s), wherein the phosphor has a lattice constant a of 0.9747 nm or more and 0.9770 nm or less, and a lattice constant c of 0.5050 nm or more and 0.5055 nm or less, and wherein the phosphor has a Ca content of 27.8% by mass or more and 28.8% by mass or less, a dissolved oxygen content in the phosphor of 0.3% by mass or more and 1.2% by mass or less, and an Eu content of 0.4% by mass or more and 1.2% by mass or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.