A solar cell includes a semiconductor substrate containing impurities of a first conductive type, a back surface field region which is positioned on a back surface of the semiconductor substrate and is doped more than the semiconductor substrate with impurities of the first conductive type, an emitter region which is on the back surface of the semiconductor substrate adjacent to the back surface field region and contains impurities of a second conductive type different than the first conductive type, a metal layer which contains impurities of the second conductive type and on a back surface of the emitter region, a back passivation layer exposing a portion of the back surface field region and a portion of the metal layer.