Solar cell and solar cell module

A solar cell comprising:

• a P-type silicon substrate in which one main surface is a light-receiving surface and another main surface is a backside;
• a back surface passivation layer provided on a part of the backside of the P-type silicon substrate;
• a plurality of back surface electrodes in contact with the P-type silicon substrate in a plurality of contact areas in which the back surface passivation layer is not provided, the plurality of back surface electrodes being connected with each other so that the plurality of back surface electrodes are integrated and formed on a whole surface of the back surface passivation layer;
• an N-type layer formed on at least a part of the light-receiving surface of the P-type silicon substrate;
• a light-receiving surface passivation layer;
• and
• a light-receiving surface electrode that is in electrical contact with the N-type layer,
• wherein:
• the P-type silicon substrate is a silicon substrate doped with gallium;
• the P-type silicon substrate has a resistivity of 0.2 to 2.5 Ω·cm;
• the plurality of contact areas has a pitch Prm[mm] of 1 to 10 mm;
• and
• the pitch Prm [mm] of the plurality of contact areas and the resistivity Rsub [Ω·cm] of the P-type silicon substrate satisfy the relation represented by the following formula (1)
• log(Rsub)≤−log(Prm)+1.0 (1).