Patent ID: 8304791

Claim:
A nitride-based semiconductor light emitting device comprising: an n-type semiconductor layer, an active layer, and a p-type semiconductor layer sequentially stacked on a substrate, wherein the active layer comprising: a first barrier layer formed of In x Ga (1-x) N (about 0.01≦x≦about 0.05) on an n-type semiconductor layer; a first diffusion barrier layer formed of In y Ga (1-y) N (about 0≦y<about 0.01) on the first barrier layer, and doped with an anti-defect agent comprising both of an N (nitrogen) element and a Si (silicon) element; a quantum well layer formed of In z Ga (1-z) N (about 0.25≦z≦about 0.35) on the first diffusion barrier layer; a second diffusion barrier layer formed of In y Ga (1-y) N (about 0≦y<about 0.01) on the quantum well layer, and doped with an anti-defect agent comprising both of an N element and a Si; and a second barrier layer formed of In x Ga (1-x) N (about 0.015≦x≦about 0.05) on the second diffusion barrier layer.