What does semiconductor mean?

A substance that is usually solid element or a compound which can conduct electricity under certain conditions that makes it a good medium for the passing of current is known as a semiconductor. Basically, semiconductors are the materials which are conductive between an insulator that are non-conductors and metals that are conductors. They can either be a pure element or even compounds. They’re an important part of our lives due to the role played by them in the electronic devices. Solid state Physics has classified the material that exist in nature into three types- Insulators, semiconductors and conductors. The material with fully occupied valence bands and empty conduction bands are insulators, the material with almost fully filled valence band and almost empty conduction band are semiconductors whereas the material with empty conduction band and fully filled conduction band are conductors

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