Patent ID: 8993992
Filing Date: 2015-03-31
Classification: H01L,H04N

Abstract:
1. A GaN based semiconductor light-emitting device comprising: a first GaN based compound semiconductor layer of an n-conductivity type; an active layer; a second GaN based compound semiconductor layer of a p-conductivity type; an underlying layer composed of a GaN based compound semiconductor including In, the underlying layer being disposed between the first GaN based compound semiconductor layer and the active layer, wherein the underlying layer has a thickness of 20 nm or more, and wherein the underlying layer is composed of a single composition and does not absorb light at an emission wavelength of the active layer; a lower spacer layer composed of an undoped GaN based compound semiconductor, the lower spacer layer having a thickness of 50 nm or less and being disposed between the active layer and the underlying layer, and a distance between the underlying layer and the active layer is 50 nm or less; and a superlattice layer composed of a GaN based compound semiconductor doped with a p-type dopant, the superlattice layer being disposed between the active layer and the second GaN based compound semiconductor layer, the superlattice layer having a structure in which a plurality of a first type of GaN based layers are stacked periodically and alternately with a plurality of a second type of GaN based layers.