Difference Between Intrinsic & Extrinsic Semiconductors

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S.NO Intrinsic semiconductors Extrinsic semiconductors
1. Semiconductor in a pure form is called intrinsic semiconductor. Semiconductor which are doped with impurity is called extrinsic semiconductor.
2. Here the charge carriers are produced only due to thermal agitation Here the charge carriers are produced due to impurities and may also be produced due to thermal agitation.
3. They have low electrical conductivity. They have high electrical conductivity.
4. They have high operating temperature. They have low operating temperature.
5. At 0K, the Fermi level exactly lies between conduction band and valence band.

Examples : Si, Ge, etc.

At 0K, Fermi level lies closer to conduction band in ‘n’ type semiconductor and lies near valence band in ‘p’ type semiconductor.

Examples : Si and Ge doped with Al, In, P, As etc.

Which is intrinsic semiconductor?

Silicon and germanium are examples of intrinsic semiconductors.

Read More Topics
Variation of carrier concentration with temperature
Elemental and compound semiconductors
Difference between N & P type semiconductor

Santhakumar Raja

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