Solar cell and method for manufacturing the same

A solar cell, comprising:

• a silicon substrate;
• a tunnel layer disposed on a first surface of the silicon substrate, the tunnel layer including a dielectric material;
• a polycrystalline silicon layer disposed on the tunnel layer;
• a dielectric layer disposed on the polycrystalline silicon layer;
• and
• an electrode penetrating through the dielectric layer and directly contacting with the polycrystalline silicon layer,
• wherein the polycrystalline silicon layer includes a metal crystal region positioned at a region where the polycrystalline silicon layer contacts the electrode,
• wherein the metal crystal region includes a plurality of metal crystals, the plurality of metal crystals including a metal material same as a metal material included in the electrode,
• wherein the electrode includes a plurality of finger electrodes extending in a first direction and a bus electrode extending in a second direction crossing the first direction, and
• wherein an amount of glass frit per unit volume in the plurality of finger electrodes is less than an amount of glass frit per unit volume in the bus electrode.