| 摘要 |
It is an object of the present invention to provide a CIGS type solar cell which has a common construction, which has a durability, wherein an alkali metal can be supplied to a CIGS layer. A CIGS type solar cell comprising; an insulative supporting substrate; a rear surface electrode layer provided on the insulative supporting substrate; a CIGS layer provided on the rear surface electrode layer; a buffer layer provided on the CIGS layer; and a transparent front surface electrode layer provided on the buffer layer; the solar cell further comprising an alkali metal supply layer provided between the insulative supporting substrate and the rear surface electrode layer or provided between the rear surface electrode layer and the CIGS layer, or between the insulative supporting substrate and the rear surface electrode layer and between the rear surface electrode layer and the CIGS layer; and the alkali metal supply layer containing at least one compound selected from the group consisting of a LiNbO 3 compound, a NaNbO 3 compound and a KNbO 3 compound. |
