Light-emitting device

摘要

A light-emitting device, a method of fabricating the light-emitting device, a light-emitting device package and a lighting system are provided. The light-emitting device may include a substrate 105; a first conductivity type semiconductor layer 12 disposed on the substrate 105; an active layer 114 disposed on the first conductivity type semiconductor layer 12; a second conductivity type semiconductor layer 16 disposed on the active layer 114; a first electrode 131 disposed on the first conductivity type semiconductor layer 112; a second electrode 132 disposed on the second conductivity type semiconductor layer 116; a first light extraction pattern P provided on a top surface of the substrate 105; and a second light extraction pattern 150 provided on sides of the substrate 105.

主权项

1. A light-emitting device comprising:
a substrate; a first conductivity type semiconductor layer disposed on the substrate; an active layer disposed on the first conductivity type semiconductor layer; a second conductivity type semiconductor layer disposed on the active layer; a first electrode disposed on the first conductivity type semiconductor layer; a second electrode disposed on the second conductivity type semiconductor layer; a first light extraction pattern provided on a top surface of the substrate; and a second light extraction pattern provided on sides of the substrate, wherein the second light extraction pattern comprises at least a fourth pattern and a fifth pattern, and the fourth pattern and the fifth pattern have different shapes to provide an optimum optical extraction condition by providing a light extraction structure with patterns of various periods and heights.