Patent ID: 8475682
Filing Date: 2013-07-02
Classification: C09K,H01L,H05B

Abstract:
1. A phosphor comprising Sr, Al, Si, N, O and Ce and/or Eu as a constituent element, wherein the content of Sr is 22.0 wt % or more and 28.0 wt % or less, the content of Al is 5.0 wt % or more and 18.0 wt % or less, the content of O is 5.0 wt % or less, the content of N is 27.0 wt % or more, and the phosphor comprises at least one element selected from the group consisting of Ce and Eu in an amount of greater than 0 and less than 5.0 wt %, and when excited by light in a wavelength range from 300 nm to 500 nm, the phosphor has an emission spectrum with a peak wavelength in a range from 500 nm to 620 nm, and a value of coefficient of variation CV calculated by the following formula is 100% or less, wherein the Coefficient of Variation CV %=standard deviation/calculated average particle size×100, wherein when an emission intensity at a temperature of 25° C. when this phosphor is irradiated with a prescribed excitation light in the wavelength range from 300 nm to 500 nm is defined as P