Patent ID: 8728854

Claim:
A method for producing a solar cell, comprising steps of: forming a barium silicide layer by allowing Si atoms and Ba atoms to react with each other on a substrate; forming an impurity-doped barium silicide layer on a surface of the barium silicide layer by vapor-depositing impurity atoms, which are Sb atoms, Ba atoms and Si atoms on the surface of the barium silicide layer and allowing the atoms to react with each other, wherein during said vapor-depositing a temperature of a vapor deposition source of the impurity atoms is controlled in a range of 300° C. to 350° C. to thereby adjust an electron density of the impurity-doped barium silicide layer to a value in a range of 10 17 cm −3 to 10 20 cm −3 ; forming a lower electrode on the substrate; and forming an upper electrode on a surface of the impurity-doped barium silicide layer.