Solar cell and solar cell module

A solar cell module comprising:

• a plurality of solar cells and a sealing layer that seals the solar cells,
• wherein the solar cells include:
• a base substrate that has a principle surface;
• a first semiconductor layer that is provided in a first region on the principle surface;
• a second semiconductor layer that is provided in a second region, which is different from the first region, on the principle surface;
• an n-side electrode that includes a plurality of n-side finger electrodes extending in a first direction and that is provided on the first semiconductor layer;
• and
• a p-side electrode that includes a plurality of p-side finger electrodes extending in the first direction and that is provided on the second semiconductor layer,
• wherein the n-side finger electrodes and the p-side finger electrodes are alternately arrayed in a second direction that intersects with the first direction,
• wherein the outer periphery of the principle surface has a first side extending in the first direction and a second side extending in the first direction and opposing the first side in the second direction,
• wherein the principle surface has a first outer peripheral region provided along the first side, a second outer peripheral region provided along the second side, and an inner region provided between the first and second outer peripheral regions,
• wherein a plurality of first grooves are provided in the first outer peripheral region to separate n-side finger electrodes and p-side finger electrodes,
• wherein a plurality of second grooves are provided in the second outer peripheral region to separate n-side finger electrodes and p-side finger electrodes,
• wherein a plurality of third grooves are provided in the inner region to separate the n-side finger electrodes and the p-side finger electrodes, and
• wherein the widths of the first and second grooves in the second direction are larger than the widths of the third grooves in the second direction.