Question

explain in detail conductor, semiconductor and insulator with band theory.​

Answer 1

Conductors are the substance that transmits heat or electricity through them. Such substance or materials that may act as a conductor, as well as insulators under different conditions, are known as semiconductors. Insulators are the substance that does not allow heat or electricity to pass through them. The electronic band structure is an energy schema to describe the conductivity of conductors, insulators, and semiconductors. The schema consists of two energy bands (valence and conduction band) and the band gap.... Between the two energy bands there is the band gap, its width affects the conductivity of materials.Classification of Metals, Semiconductors, and Insulators. In case of metallic conductors, conduction band overlaps on the electrons in the valence band. In insulators, there is a large gap between both these bands. ... Semiconductors have a small gap between both these bands.

Answer 2

Answer:

According to band theory,

• Conductors are those in which there is no forbidden gaps.
• Insulators are those in which the gap between valence bond and conductive bond is too far. Forbidden gap is too larger.
• Semi conductors are those solids in which the forbidden gap between valence bond and conductive bond is neither too far nor to close.