Patent ID: 9570655
Date: 2017-02-14
CPC Classifications: C09K,H01L

Claim:
1. A semiconductor light-emitting device comprising: a semiconductor light-emitting element that emits blue light; a green fluorescent material that absorbs the blue light to emit green light; an orange fluorescent material that absorbs the blue light to emit orange light, wherein a light emission peak wavelength of the semiconductor light-emitting element is in a range of 440 to 470 nm; and the orange fluorescent material is an Eu-activated α SiAlON fluorescent material that has a peak wavelength of a light emission spectrum in a range of 605 to 620 nm, wherein a specific surface area of the Eu-activated α SiAlON fluorescent material is 0.4 m2/g or smaller, and wherein the mass ratio of the green fluorescent material to the orange fluorescent material is in the range of 0.5 to 4.0.