Difference between intrinsic and extrinsic semiconductor

Intrinsic semiconductor Extrinsic semiconductor
The intrinsic semiconductor is extremely pure semiconductor. The extrinsic semiconductor is impure semiconductor.
Electrical conductivity of intrinsic semiconductors is poor. The electrical conductivity of extrinsic semiconductor is large.
The number of electron and holes produced due to the thermal energy are equal. The number of electron and holes produced due to the thermal energy are not equal.
The current conduction is due to electrons and holes. The current conduction is due to either holes or electrons.
The Fermi level is at the centre of forbidden energy gap and is unchanged with change in temperature. The Fermi level is shifts upward or downward with change in temperature.

 

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