Question

The band gap size for insulators are in the range of ______ eV.

Answer 1

Hint :We know that in a medium where electrons cannot exist, is defined as the band gap is an energy range. The energy of this band gap is the energy difference between the valence and the conduction band. The calculation is usually performed in electron volts (eV).

Complete Step By Step Answer:
A semiconductor is a material with an intermediate but non-zero band gap which acts as an insulator at zero absolute but enables electrons to thermally excite at temperatures below their melting point in their conducting bands. By comparison, an insulator is a substance with a wide variety. Drivers will overlap the valence and driving bands such that the band difference cannot be identified.
An insulator is an essential element that is separated between the valence and the conductive band or a broad energy distinction. This major gap in energy allows it impossible for electrons to travel to the conductive band to migrate and generate an electric current. Insulators should be called the reverse of conductors; strong insulators have high resistivity and inhibit the movement of electricity.
The band gap size for insulators are in the range of $ 3-4\text{ }eV. $ The band gap size for semiconductors is in the range of $ 2-3\text{ }eV. $

Note :
Remember that Band Gap in semiconductors consists of two types. One is, Conventional band gap semiconductors: e.g.- Silicon has a band gap of $ 1.15eV. $ Second is, Wide band gap semiconductors: e.g.- Titanium Dioxide has a band gap of $ 3-3.2eV. $ Conduction band primarily consists of empty shells. The excited electrons are accommodated in the conduction band after absorbing energy.