1. A solar cell, comprising: a first conductive type substrate; an emitter layer of a second conductive type opposite the first conductive type, the emitter layer and the substrate forming a p-n junction; a plurality of first electrodes electrically connected to the emitter layer; at least one current collector connected to the plurality of first electrodes; and a second electrode electrically connected to the substrate, wherein each of the plurality of first electrodes comprises a first electrode layer and a second electrode layer positioned on the first electrode layer, and the at least one current collector comprises a plurality of first current collector layers having a plurality of first portions and at least one second current collector layer positioned on the plurality of first current collector layers.