Patent ID: 8426723

Claim:
A solar cell, comprising: a substrate of a first conductive type; an emitter layer of a second conductive type positioned in a first surface of the substrate, the emitter layer including a first impurity doped portion and a second impurity doped portion, the first impurity doped portion positioned on the second impurity doped portion and the second impurity doped portion having an impurity doped concentration higher than an impurity doped concentration of the first impurity doped portion, and the second conductive type being opposite to the first conductive type; a first electrode connected to the emitter layer; and a second electrode positioned on a second surface of the substrate and connected to the substrate, the second surface being opposite the first surface with respect to the substrate, wherein the first impurity doped portion is farther from the second surface of the substrate than the second impurity doped portion, and wherein the second impurity doped portion is positioned in the entire first surface, and the first impurity doped portion comprises a textured surface.