FIG. 1 is a front perspective view of a solar cell showing the claimed design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a top plan view thereof, the bottom plan view being a mirror image thereof;
FIG. 5 is a right side view thereof, the left side view being a mirror image thereof;
FIG. 6 is a front perspective view of another solar cell showing the claimed design;
FIG. 7 is a front view thereof;
FIG. 8 is a rear view thereof;
FIG. 9 is a top plan view thereof, the bottom plan view being a mirror image thereof; and,
FIG. 10 is a right side view thereof, the left side view being a mirror image thereof.
In the drawings, the broken lines show portions of the solar cell that form no part of the claimed design.