A light emitting device is provided that includes a light emitting structure including a first semiconductor layer, an active layer and a second semiconductor layer, with a roughness formed in a surface of the first semiconductor layer; a phosphor layer arranged on the first semiconductor layer; and an adhesive activation layer arranged between the first semiconductor layer and the phosphor layer. The adhesive activation layer fills a concave part of the roughness and a boundary surface between the adhesive activation layer and the phosphor layer is level.