Phosphor, light-emitting apparatus including the same, and phosphor production method
US9705049B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 25, 2014 |
| Grant date | Jul 11, 2017 |
| Priority date | — |
| Expiry date | Mar 16, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2982
Abstract
A phosphor is provided which is represented by the general formula MxCeySi6-zBzN8+w. M is at least one element selected from the group consisting of La, Y, Tb and Lu. And w, x, y, and z satisfy 2.0<w<4.0, 2.0<x<3.5, 0<y<1.0, and 0<z<2.0, respectively. The phosphor can be efficiently excited by light in a range from near-ultraviolet to blue light, and emit light having components that widely extend mainly from green range to yellow range. A light-emitting apparatus includes the phosphor together with a light-emitting device that emits light in a range from near-ultraviolet to blue light, and can have improved light emission efficiency, good color rendering property, and good color reproduction range. In the case where a light-emitting apparatus includes an additional phosphor, it is possible to further improve its light emission spectrum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.