Patent ID: 9070805
Filing Date: 2015-06-30
Classification: H01L

Abstract:
1. A nitride semiconductor light-emitting device comprising: a first conductive-type nitride semiconductor layer; a superlattice layer provided on said first conductive-type nitride semiconductor layer; an active layer provided on said superlattice layer; and a second conductive-type nitride semiconductor layer provided on said active layer, wherein an average carrier concentration of said superlattice layer is higher than an average carrier concentration of said active layer, said superlattice layer is formed of alternate lamination of a doped layer containing a first conductive-type impurity and an undoped layer not containing said first conductive-type impurity, thickness per one layer of said doped layer is greater than or equal to 1.5 nm and less than or equal to 15 nm, thickness per one layer of said undoped layer is greater than or equal to 0.5 nm and less than or equal to 5 nm, each of said doped layer and said undoped layer of the superlattice layer contains In, and said active layer generates light, and the average carrier concentration of said superlattice layer is greater than or equal to 1.2 and smaller than 5 times the average carrier concentration of said active layer.