n-type diffusion layer-forming composition, a manufacturing method of a manufacturing method and a solar cell element of the n-type diffusion layer

At least one boron compound selected the p-type diffusion layer forming composition of boron nitride and boron carbide, constituting contains a dispersion medium. The p-type diffusion layer forming composition by applying the coating to thermal diffusion treatment on a semiconductor substrate, the p-type diffusion layer, and a solar cell element having a p-type diffusion layer is manufactured.