A solar cell, comprising: a crystalline silicon substrate containing impurities of a first conductive type; at least one emitter layer being formed of amorphous silicon on a first surface of the crystalline silicon substrate, the at least one emitter layer being formed of a material of a second conductive type opposite of the first conductive type and the at least one emitter layer forming a hetero-junction as well as a p-n junction with the crystalline silicon substrate; a first transparent conductive layer on the at least one emitter layer; a second transparent conductive layer positioned on a second surface of the crystalline silicon substrate; at least one first electrode (41, 42) positioned on the first transparent conductive layer and electrically connected to the at least one emitter layer through the first transparent conductive oxide layer; and at least one second electrode positioned on the second transparent conductive layer and electrically connected to the crystalline silicon substrate through the second transparent conductive oxide layer, characterized in that the first electrodes (41, 42) include a first conductive layer (411, 421) positioned on the first transparent conductive layer and a second conductive layer (412, 422) on the first conductive layer (411, 421), the second electrodes include a first conductive layer (451, 551) positioned on the second transparent conductive layer, and a second conductive layer (452, 552) on the first conductive layer (451, 551), the second conductive layers (412, 422, 452, 552) are plated metal layers having a density greater than a density of the first conductive layers (411, 421, 451, 551), the first transparent conductive layer and the first conductive layer (411, 421) of the first electrode (41, 42) have different conductivities, the second transparent conductive layer and the first conductive layer (451, 551) of the second electrode have different conductivities, and wherein the second electrodes are formed on portions of the second transparent conductive oxide layer. a crystalline silicon substrate containing impurities of a first conductive type; at least one emitter layer being formed of amorphous silicon on a first surface of the crystalline silicon substrate, the at least one emitter layer being formed of a material of a second conductive type opposite of the first conductive type and the at least one emitter layer forming a hetero-junction as well as a p-n junction with the crystalline silicon substrate; a first transparent conductive layer on the at least one emitter layer; a second transparent conductive layer positioned on a second surface of the crystalline silicon substrate; at least one first electrode (41, 42) positioned on the first transparent conductive layer and electrically connected to the at least one emitter layer through the first transparent conductive oxide layer; and at least one second electrode positioned on the second transparent conductive layer and electrically connected to the crystalline silicon substrate through the second transparent conductive oxide layer, characterized in that the first electrodes (41, 42) include a first conductive layer (411, 421) positioned on the first transparent conductive layer and a second conductive layer (412, 422) on the first conductive layer (411, 421), the second electrodes include a first conductive layer (451, 551) positioned on the second transparent conductive layer, and a second conductive layer (452, 552) on the first conductive layer (451, 551), the second conductive layers (412, 422, 452, 552) are plated metal layers having a density greater than a density of the first conductive layers (411, 421, 451, 551), the first transparent conductive layer and the first conductive layer (411, 421) of the first electrode (41, 42) have different conductivities, the second transparent conductive layer and the first conductive layer (451, 551) of the second electrode have different conductivities, and wherein the second electrodes are formed on portions of the second transparent conductive oxide layer.