| 主权项 |
1. A solar cell comprising:
a crystal silicon substrate of a first conductivity type including a first principal surface and a second principal surface; a first amorphous silicon film of a second conductivity type provided on a side of the first principal surface; and a second amorphous silicon film of the first conductivity type provided on a side of the second principal surface, wherein at least one of the first amorphous silicon film and the second amorphous silicon film has a multi-layer structure including amorphous silicon layers, and an oxygen-rich layer is provided between any adjacent two of the amorphous silicon layers in the multi-layer structure. |
