High purity monocrystalline silicon is an important semiconductor material. IIIA of the trace elements mixed in Mono, the formation of p-type Silicon semiconductor; addition of VA, trace elements, the formation of n-type semiconductor. P-type and n-type semiconductors are combined together to form a p-n junction, you can make solar panels, radiant energy into electrical energy. In terms of energy is a promising material. Extensive application of diodes, transistors, transistor, field-effect transistors and integrated circuits (including computer chips and CPU) are made of Silicon raw materials.