| 摘要 |
<p>Provided is a light emitting device according to one invention including: a substrate (200) which has protrusions (220) on the C-face, and of which unit cells are constructed in a hexagonal structure; a semiconductor layer (320) which is formed on the substrate, in which empty spaces are formed in sides of the protrusions, and of which unit cells are constructed in a hexagonal structure; and a light emitting structure layer (360) comprising a first conductive semiconductor layer (330), a second conductive semiconductor layer (350), and an active layer (340) formed between the first conductive semiconductor layer and second conductive semiconductor layer which are formed on the semiconductor layer, wherein the A-face of the substrate and the A-face of the semiconductor layer form an angle of greater than zero degree, and the protrusions include the R-faces.
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