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Silicon is the eighth most common element in the universe by mass, but very rarely occurs as the pure element in the Earth's crust. It is most widely distributed in dusts, sands, planetoids, and planets as various forms of silicon dioxide (silica) or silicates.
Silicon (Si) is one of the most important semiconductors today because it has a very low occurance of defects. While it's the building block of most electronic devices, other semiconductors are becoming more important in industry because of their superior properties.anometer-scale semiconductor particles can emit light of different colors depending on their size. Semiconductors are also used to fabricate solar cells because they absorb light and generate a current. Silicon-based solar cells are currently the most popular cells used.