Solar cell and method of manufacturing the same

A solar cell, comprising:

• a substrate of a first conductive type having at least one via hole, the at least one via hole having a textured surface having a plurality of uneven portions;
• an emitter layer of a second conductive type opposite the first conductive type formed in the substrate;
• at least one first electrode formed on the emitter layer positioned on a first surface of the substrate;
• at least one current collector positioned on a second surface of the substrate, which is opposite the first surface and electrically connected to the at least one first electrode through the at least one via hole;
• and
• a second electrode positioned on the second surface of the substrate to be spaced apart from the at least one current collector and electrically connected to the substrate,
• wherein the substrate further comprises a plurality of uneven portions formed on at least one of the first surface and the second surface of the substrate,
• a height of each of the plurality of uneven portions formed in the at least one via hole is greater than a height of each of the plurality of uneven portions formed on the at least one of the first surface and the second surface of the substrate, and
• each of the plurality of uneven portions has a pyramid shape and the height of each uneven portion formed at the at least one via hole is approximately 10 μm to 50 μm, and the height of each of the plurality of uneven portions formed on the at least one of the first surface and the second surface of the substrate is 5 μm to 10 μm.