A "square centimeter" refers to a unit of measurement that calculates the area of a shape or surface. It represents a square with each side measuring one centimeter in length. Full definition
The total integrated intensity is 1.3 x 10 - 8 erg per square centimeter per second. (science.sciencemag.org)
And the efficiency with which a field generates electricity can be improved in the future by moving to higher temperature operation, he adds; the current design employs steam at 440 degrees Celsius and 63 kilograms per square centimeter of pressure at peak capacity. (scientificamerican.com)
At the moment, the solar cells can generate roughly 2.5 milliwatts per square centimeter in typical sunlight conditions. (tomsguide.com)