Abstract: A light-emitting device includes a patterned substrate, a buffer layer, an epitaxial layered unit, and at least one hole structure. The patterned substrate includes a supporting substrate having an upper surface, and a plurality of protrusions formed on the upper surface. Each of the protrusions includes a base and a cone sequentially stacked in such order on the upper surface. The cone is made of a material different from that of the supporting substrate. The buffer layer formed on a side wall surface of each of the protrusions and the upper surface of the supporting substrate exposed from the protrusions. The epitaxial layered unit is formed on the buffer layer opposite to the patterned substrate. The hole structure is disposed above a top end of at least one of the protrusions. A method for manufacturing the light-emitting device is also disclosed.