A semiconductor substrate and a manufacturing method thereof, a solar cell element, and a solar cell

A semiconductor substrate and a manufacturing method thereof excellent light conversion efficiency, and to provide a solar cell element and a solar cell is formed by using the same. And A semiconductor layer, K, Na, Li, Ba, Sr, Ca, Mg, Be, Zn, Pb, Cd, V, Sn, Zr, Mo, La, Nb, Ta, Y, Ti, Zr, Ge, semiconductor having a impurity diffusion layer containing at least one, and at least one impurity atom selected from the group consisting of n-type impurity atoms and p-type impurity atoms of a metal atom selected from the group consisting of Te and Lu substrate. .BACKGROUND