A semiconductor light emitting device is provided. The semiconductor light emitting device includes a plurality of light emitting structures, each of which includes a first surface and a second surface, a plurality of embossed portions provided on the first surface; a partition wall structure provided on the first surface of the plurality of light emitting structures and including a plurality of partition walls which define a plurality of pixel spaces; and a fluorescent layer provided in the plurality of pixel spaces. A bottom surface of the partition wall structure contacts the plurality of embossed portions.