Light emitting device with a roughened surface and including an etching control layer for photoelectrochemical etching, light emitting device package, and light unit

摘要

A light emitting device (100) includes a first conductive semiconductor layer (11,14) providing a roughness (17) on a upper surface thereof and including a PEC etching control layer (15); an active layer (12) under the first conductive semiconductor layer; a second conductive semiconductor layer (13) under the active layer; a reflective electrode (50) electrically connected to the second conductive semiconductor layer; and a first electrode (20) electrically connected to the first conductive semiconductor layer.