Patent ID: 8461606

Claim:
A semiconductor light-emitting device comprising: a substrate having a C-surface; an n-type semiconductor layer provided on the C-surface and including a nitride semiconductor; a p-type semiconductor layer including a nitride semiconductor; a light-emitting portion provided between the n-type semiconductor layer and the p-type semiconductor layer and including: a barrier layer including In b Ga l-b N (0≦b<1) and having a layer thickness t b (nanometers); and a well layer stacked with the barrier layer, including In w Ga l-w N (0<w<1, b<w), and having a layer thickness t W (nanometers); and a stacked body provided between the light-emitting portion and the n-type semiconductor layer and including: a first layer including In x Ga l-x N (0≦x<1) and having a layer thickness t x (nanometers); and a second layer stacked with the first layer, including In y Ga l-y N (0<y<1, x<y<w), and having a layer thickness t y (nanometers), an average In composition ratio of the stacked body being higher than 0.4 times and not higher than 0.7 times an average In composition ratio of the light-emitting portion, assuming that the average In composition ratio of the light-emitting portion is (w×t w +b×t b )/(t w +t b ), and the average In composition ratio of the stacked body is (x×t x +y×t y )/(t x +t y ), and the layer thickness t b of the barrier layer being 10 nanometers or less, a thickness of the stacked body being equal to or greater than a thickness of the light-emitting portion, a thickness of the first layer being thicker than 1 nanometer and thinner than 3nanometers, a thickness of the second layer being thicker than 0 nanometer and thinner than 2 nanometers.