Question

For what value of temperature the intrinsic semiconductor acts as an insulator and which band do the thermally exited electrons at T>O k occupy?​

Answer 1

The intrinsic semiconductor acts as an insulator at absolute zero temperature (0 Kelvin).

When electrons are excited, it move to conduction band when temperature is greater than zero kelvin.

Explanation:

• Intrinsic semiconductor is a semiconductor without any external doping. It has both holes and electrons.
• When the temperature of the semiconductor is increased then the kinetic energy of the electron increases.
• The electron is in the valance band when the temperature is zero kelvin whereas the electron moves to conduction band when it is excited. It reduces the gap between the valance and conduction band. This helps to carry the current through the electrons.