Global energy demand and environmental concerns are the driving force for use of alternative, sustainable, and clean energy sources. Solar energy is the inexhaustible and CO2-emission-free energy source worldwide. The Sun provides 1.4 10 TW power as received on the surface of the Earth and about 3.6 10 TW of this power is usable. In 2012, world power consumption was 17 TW, which is less than 3....