Patent ID: 8048338
Filing Date: 2011-11-01
Classification: C09K,H01L

Abstract:
1. A phosphor of the formula MmAaDbOoNn:Z, where element M is at least one kind of element having bivalent valency, element A is at least one kind of element having tervalent valency, element D is at least one kind of element having tetravalent valency, O is oxygen, N is nitrogen, and element Z is at least one kind of element acting as an activator, satisfying 5.0<(a+b)/m<9.0, 0≦a/m≦2.0, 0≦o≦n, n=2/3m+a+4/3b−2/3o, and having an emission spectrum with a maximum peak in the wavelength range from 400 nm to 500 nm under an excitation of the light in a wavelength range from 250 nm to 430 nm.