| 摘要 |
Disclosed are phosphors and, more particularly, yellow light emitting phosphors and light emitting device packages using the same. The yellow light emitting phosphor includes a first phosphor to emit light having a central wavelength located within a band of 510 nm to 550 nm, a second phosphor adapted to be mixed with the first phosphor to emit light having a central wavelength located within a band of 560 nm to 600 nm, and a third phosphor adapted to be mixed with the first and second phosphors to emit light having a central wavelength located within a band of 610 nm to 630 nm, the third phosphor having a light absorption rate of 50% or less at a wavelength of 550 nm. |
| 主权项 |
1. A yellow light emitting phosphor comprising:
a first phosphor including at least one of BaYSi4N7:Eu, Ba3Si6O12N2:Eu, CaSi2O2N2:Eu, SrYSi4N7:Eu, α-type SiAlON(Ca-α-SiAlON:Yb) containing Ca as a metal component, Lu3Al5O12:Ce, and SrSi2O2N2:Eu, the first phosphor being adapted to emit light having a central wavelength located within a band of 510 nm to 550 nm; a second phosphor including at least one of α-type SiAlON(Li-α-SiAlON:Eu) containing Li as a metal component and α-type SiAlON(Ca-α-SiAlON:Eu) containing Ca as a metal component, the second phosphor being mixed with the first phosphor to emit light having a central wavelength located within a band of 560 nm to 600 nm; and a third phosphor including at least one of CaAlSiN3:Eu, (Sr, Ca)AlSiN3:Eu, Sr2Si5N8:Eu, K2SiF6:Mn, La3Si6N11:Ce, SrAlSiN3:Eu, SrCN2:Eu, Ca2Si5N8:Eu, Ba2Si5N8:Eu, SrAlSi4N7:Eu, and (Sr, Ba)SiN2:Eu, the third phosphor being mixed with the first and second phosphors to emit light having a central wavelength located within a band of 610 nm to 630 nm, the third phosphor having a light absorption rate of 50% or less at a wavelength of 550 nm. |
