Patent ID: 8981208
Filing Date: 2015-03-17
Classification: H01L,Y02E

Abstract:
1. A solar cell comprising: a substrate of a first conductive type; an emitter layer of a second conductive type opposite the first conductive type, the emitter layer configured to form a p-n junction along with the substrate; a plurality of first electrodes connected to the emitter layer, each of the plurality of first electrodes having a multi-layered structure; at least one first current collector that is connected to the plurality of first electrodes and has a single-layered structure; and a second electrode connected to the substrate, wherein each of the plurality of first electrodes includes a first electrode layer and a second electrode layer on the first electrode layer, wherein a portion of the at least one first current collector overlaps with a portion of the first electrode layer, wherein the portion of the at least one first current collector is positioned on the portion of the first electrode layer, wherein the first electrode layer is positioned between the substrate and the second electrode layer, and between the substrate and the at least one first current collector, wherein the first electrode layer is in direct contact with the second electrode layer and the at least one first current collector, wherein the plurality of first electrodes and the at least one first current collector contain silver (Ag), a silver content of the first electrode layer is different from a silver content of the second electrode layer, and a silver content of the at least one first current collector is substantially equal to the silver content of the second electrode layer, and wherein the silver content of the first electrode layer is greater than the silver content of the second electrode layer and the silver content of the at least one first current collector.