Electricity is the most convenient form of energy, therefore, the research on the possibility of obtaining it directly from solar radiation and the research hopes related to it are understandable. It is also a "clean" and safe method of producing electricity. Photovoltaic batteries, from electricity sources mainly used in space vehicles, are becoming more common in these situations, where it is difficult to bring electricity by conventional methods (navigational buoys, telecommunications relays, devices for collecting and transmitting meteorological and environmental data, clocks, calculators and other portable devices).
Currently, research work is focused on developing the cheapest possible technologies for use on the ground in small power supplies and large power plants.
Scientists, with various possibilities of using solar energy and converting it into work or electricity, with the present state of knowledge, they gave up the possibility of its common processing into work, both in thermocouples, as well as photochemistry and photobiology.
The most common and massively used photovoltaic cells are, which are becoming very accessible and competitive with traditional energy sources.
The cost of electricity generated in nuclear power plants is 0,5 o. 1 US dol/W. These programs also assumed mass production of solar cells in the first half of the 1980s, which, however, did not happen due to the cut in crude oil. Based on experience with currently operating solar generators, it was assessed, that the cost of energy from these sources is twice as low, when they work in sunny countries. There is also the cost of storing electricity, most often in lead batteries. Currently, solar batteries are the most widely used, in which silicon photovoltaic cells are used. Due to the relatively good photoelectric properties and the universality and cheapness of the raw material, this semiconductor has become the material most commonly used for photovoltaic cells..