Solar cell panel

A solar cell panel comprising:

• a plurality of solar cells, each solar cell including a substrate, a first electrode positioned on a first surface of the substrate and a second electrode positioned on a second surface of the substrate that is opposite the first surface of the substrate, the second electrode having a non-bus bar structure including at least one first portion and at least one second portion adjacent to the at least one first portion, and the at least one first portion and the at least one second portion being formed of same material and extending parallel to each other;
• a first conductive adhesive film including a first resin and a plurality of first conductive particles dispersed in the first resin, the first conductive adhesive film being positioned on a second surface of the at least one first portion of the second electrode that is opposite a first surface of the at least one first portion of the second electrode that contacts the substrate, and a first surface of the first conductive adhesive film that faces the second electrode entirely contacting at least one of the second surface of the at least one first portion of the second electrode and the second surface of the substrate;
• and
• an interconnector positioned on a second surface of the first conductive adhesive film that is opposite the first surface of the first conductive adhesive film,
• wherein the second surface of the substrate disposed between adjacent first portions of the second electrode is entirely covered by the at least one second portion of the second electrode,
• wherein the second electrode comprises a high density aluminum layer on the second surface of the substrate and a low density aluminum layer on the high density aluminum layer, the lower density aluminum layer having a lower density than the high density aluminum layer, and
• wherein the at least one first portion is made only of the high density aluminum layer and the at least one second portion of the second electrode is made of the high density aluminum layer and the low density aluminum layer.