Semiconductor light emitting device and method for manufacturing the same
Provided is a semiconductor light emitting device and a method for manufacturing the same. The semiconductor light emitting device comprises: a first conductive type semiconductor layer; an active layer on the first conductive type semiconductor layer; an undoped semiconductor layer on the active layer; a first delta-doped layer on the undoped semiconductor layer; and a second conductive type semiconductor layer on the first delta-doped layer.
1. A light emitting device comprising:
a n-type semiconductor layer including a semiconductor material having a composition formula of In x Al y Ga 1-x-y N (0≦x≦1, 0≦y≦1, 0≦x+y≦1);
a delta-doped layer on the n-type semiconductor layer;
an active layer on the delta-doped layer; and
a p-type semiconductor layer on the active layer,
wherein the p-type semiconductor layer is formed of a semiconductor material having a composition formula of In x Al y Ga 1-x-y N (0≦x≦1, 0≦y≦1, 0≦x+y≦1).
2. The light emitting device according to claim 1 , wherein the p-type semiconductor layer is on a buffer layer, and the buffer layer is on a substrate.
3. The light emitting device according to claim 1 , wherein the delta-doped layer comprises a first delta-doped layer and a second delta-doped layer.
4. The light emitting device according to claim 1 , further comprising:
a supper lattice layer between the delta-doped layer and the active layer.
5. The light emitting device according to claim 1 , further comprising:
a p-type AlGaN semiconductor layer between the active layer and the p-type semiconductor layer.