These are metal connections which collect current . The front of a Siemens Solar Industries silicon cell. Courtesy Rick Mitchell. Dimensions A typical single crystal silicon solar cell has a deep blue color and weighs under 10 grams. It is roughly 10 cm in length and width.
Different manufacturers produce cells with different dimensions.
The manufacturer can provide data on the exact dimensions and tolerances of specific cells. When calculating total cell area, it is important to note that some cells, such as the one shown above, have notched corners.