Composition for forming P-type diffusion layer, method of forming P-type diffusion layer, and method of producing photovoltaic cell

A method of producing a photovoltaic cell, the method comprising:

• providing a composition for forming a p-type diffusion layer, the composition comprising a glass powder and a dispersion medium, wherein the glass powder has a diameter of 10 μm or less and includes an acceptor element and a total amount of a life time killer element in the glass powder is 1000 ppm or less,
• applying the composition for forming a p-type diffusion layer to a semiconductor substrate of the photovoltaic cell;
• conducting a thermal diffusion treatment to form a p-type diffusion layer in the semiconductor substrate by diffusion of the acceptor element;
• and
• forming an electrode on the p-type diffusion layer.