Interesting fact, solar irradiance maxes out at around 1366 watts per square meter, and this solar cell is 1 / 133,333 square meters, so that comes out to a solar input of 10.2mW of power on that tiny little diode, which causes it to put out 16.5uW of electrical power, so it has an efficiency of 1.6%.
Pretty cool if we had much higher efficiency cells, getting that much power from that small of a space. Gotta love the sun!