Patent ID: 8110123

Claim:
A high-brightness yellow-orange yellow phosphor for use in a warm white LED (light emitting diode), the high-brightness yellow-orange yellow phosphor comprising a substrate based on a rare-earth garnet and cerium for activating said substrate wherein, (a) the high-brightness yellow-orange yellow phosphor has the [substances of] Li +1 , Mg +2 and N −3 contained therein; (b) the overall stoichiometric equation of said substrate is: Σ(Ln) 3 Al 5−x Li (x+y )Mg (x+y) O 12−3y N 3y ; (c) when activated by a shortwave light from an InGaN semiconductor heterostructure, the high-brightness yellow-orange yellow phosphor radiates in a visible orange yellow band at a predetermined wavelength, and further wherein (d) the atomic fraction of the high-brightness yellow-orange yellow phosphor is ΣLn=Σ(Y+Gd+Ce+Dy+Pr)=1, and the index of the stoichiometric equation is 0.0001≦x≦0.15, and 0.001≦y≦0.15.