Solar cell and solar cell panel including the same
A solar cell that includes: a semiconductor substrate that has a length in a first direction and a width in a second direction, the second direction being different from the first direction; a first conductive region that is coupled to the semiconductor substrate; and a first electrode that is electrically connected to the first conductive region, wherein the first electrode comprises: a plurality of finger electrodes that extend in the first direction; and a connection electrode that extends in the second direction, that electrically connects two or more of the plurality of finger electrodes to each other, and that is separated from the first conductive region, and a solar cell panel including the solar cell are disclosed.
1. A solar cell panel, comprising:
a plurality of solar cells comprising a first solar cell and a second solar cell, wherein an overlapped portion of the first solar cell overlaps with an overlapped portion of the second solar cell; and
a connecting member that is located between the overlapped portion of the first solar cell and the overlapped portion of the second solar cell and that connects the first solar cell to the second solar cell,
wherein at least one of the first solar cell or the second solar cell comprises:
a semiconductor substrate that has a length in a first direction and a width in a second direction, the second direction being different from the first direction,
a first conductive region that is coupled to the semiconductor substrate, and
a first electrode that is electrically connected to the first conductive region,
wherein the first electrode of the first solar cell comprises:
a plurality of finger electrodes that extend in the first direction, and
a connection electrode that extends in the second direction, that electrically connects two or more of the plurality of finger electrodes to each other, and that is separated from the first conductive region,
wherein two adjacent finger electrodes of the plurality of finger electrodes are separated from each other,
wherein a portion of the connection electrode is located at a space between the two adjacent finger electrodes of the plurality of finger electrodes,
wherein the connecting member includes (i) a plurality of first connecting portions that are respectively connected to the plurality of finger electrodes and (ii) a plurality of second connecting portions that are coupled to an insulating layer, the insulating layer being located at the space between the two adjacent finger electrodes of the plurality of finger electrodes, and
wherein the plurality of first connecting portions and the plurality of second connecting portions are alternately arranged in the second direction.
2. The solar cell panel of claim 1 , wherein the plurality of finger electrodes comprise respective contact portions that are directly in contact with the first conductive region.
3. The solar cell panel of claim 1 , wherein at least one portion of the connection electrode is located at a non-overlapped portion of the first solar cell.
4. The solar cell panel of claim 3 , wherein the overlapped portion of the first solar cell is located at a first side of the first solar cell, and
wherein a portion of the connection electrode of the first solar cell is located at a second side of the first solar cell, the first side being opposite to the second side relative to a center of the first solar cell.
5. The solar cell panel of claim 4 , wherein the connection electrode extends in the second direction and is respectively connected to the plurality of finger electrodes, the connected portions of the plurality of finger electrodes being located at the second side of the first solar cell.
6. The solar cell panel of claim 1 , wherein at least one portion of each of the plurality of finger electrodes is located on a surface of the connection electrode.
7. The solar cell panel of claim 6 , wherein at least one of the plurality of finger electrodes comprises:
a contact portion that is directly in contact with the first conductive region and that does not overlap with the connection electrode, and
a non-contact portion that is separated from the first conductive region and that overlaps with the connection electrode, wherein the connection electrode is located between the non-contact portion and the first conductive region.
8. The solar cell panel of claim 1 , wherein a width of the connection electrode is five times or less than a width of at least one of the plurality of finger electrodes.
9. The solar cell panel of claim 1 , wherein a thickness of the connection electrode is less than or equal to a thickness of at least one of the plurality of finger electrodes.
10. The solar cell panel of claim 1 , wherein both the connection electrode and the plurality of finger electrodes include a particular conductive material, and
wherein a glass frit of the connection electrode is different from a glass frit of the plurality of finger electrodes.
11. The solar cell panel of claim 1 , wherein the first solar cell comprises:
a connecting portion that is electrically connected to an end of at least one of the plurality of finger electrodes and that has a length greater than a width of the at least one of the plurality of finger electrodes in the second direction, the end being located at the overlapped portion of the first solar cell.
12. The solar cell panel of claim 1 , wherein the first solar cell comprises:
a second conductive region that is coupled to the semiconductor substrate, and
a second electrode that is electrically connected to the second conductive region,
wherein a surface of the second electrode is entirely in contact with the second conductive region.