Light emitting device having a multilayer re-emission layer and light emitting device package including the same

摘要

A light emitting device includes a light emitting structure comprising a first conductivity type semiconductor layer, a second conductivity type semiconductor layer and an active layer disposed between the first conductivity type semiconductor layer and the second conductivity type semiconductor layer to emit a light of a first wavelength; and a re-emission layer disposed on the light emitting structure, the re-emission layer comprising a nitride semiconductor, wherein the re-emission layer absorbs the light of the first wavelength range and the re-emission layer emits a light of a second wavelength range longer than the first wavelength range, and the re-emission layer is configured of multi layers having different indium (In) compositions, respectively, and the indium content in the multi-layer is largest in a top layer of the multi-layers.

主权项

1. A light emitting device comprising:
a light emitting structure comprising a first conductivity type semiconductor layer, a second conductivity type semiconductor layer, and an active layer between the first conductivity type semiconductor layer and the second conductivity type semiconductor layer to emit a light of a first wavelength range; and a re-emission layer disposed on the light emitting structure, the re-emission layer comprising a nitride semiconductor, wherein the re-emission layer absorbs the light of the first wavelength range and the re-emission layer emits a light of a second wavelength range longer than the first wavelength range, and wherein the re-emission layer includes multi layers having different indium (In) compositions, respectively, and the indium content in the multi-layers is largest in a top layer of the multi-layers, wherein a top surface of the light emitting structure has a concavo-convex structure, and a top surface of the re-emission layer has a concavo-convex structure according to the concavo-convex structure of the top surface of the light emitting structure.