| 摘要 |
There is provided a method for fabricating a chalcopyrite-type thin-film solar cell, which has good adhesion between the electrode layer and the light absorbing layer which consists of a chalcopyrite-type compound, and which has a stable layered structure and does not have any problems with its external appearance even when the concentration of an alkali-metal solution for forming an alkali layer is comparatively high. The method according to the present invention comprises a first step of forming onto a Mo electrode layer 2 a precursor comprised of an In metal layer and a Cu-Ga alloy layer by sputtering, a second step of attaching an alkali-metal solution onto the precursor, a selenization step of subjecting the substrate 1 which has undergone both the first and the second steps to a selenization treatment, and a transparent electrode forming step of depositing an optically transparent conductive layer. As the alkali-metal solution, an aqueous solution of an alkali metal compound, such as sodium tetraborate, sodium sulfide, and sodium aluminum sulfate, can be used. |
