Patent ID: 8053666

Claim:
A solar cell comprising: a semiconductor substrate; a first amorphous semiconductor layer of a first conductivity type, the layer formed on a first main surface of the semiconductor substrate; a second amorphous semiconductor layer of a second conductivity type, the layer formed on a second main surface of the semiconductor substrate; a plurality of through-holes which penetrate the first amorphous semiconductor layer, the semiconductor substrate, and the second amorphous semiconductor layer; an insulating layer which is formed continuously on an inner wall of each of the plurality of through-holes and on the second amorphous semiconductor layer; a plurality of line-shaped electrodes which are formed on a surface of the first amorphous semiconductor layer; a plurality of conductive layers which are formed in each of the plurality of through-holes, and which are electrically connected to one or more of the plurality of line-shaped electrodes; a first extracting electrode which is formed on the second amorphous semiconductor layer with the insulating layer in between, and which is electrically connected to the plurality of conductive layers; and a second extracting electrode which is formed on the second amorphous semiconductor layer.