Light emitting device, light emitting device package, and lighting system
Provided are a light emitting device, a light emitting device package, and a lighting system. The light emitting device comprises a first semiconductor layer comprising a plurality of vacant space parts, an active layer on the first semiconductor layer, and a second conductive type semiconductor layer on the active layer. Each of the plurality of air-lenses has a thickness less than that of the first semiconductor layer.
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