Difference between Intrinsic semiconductor and Extrinsic semiconductor

Difference between Intrinsic semiconductor and Extrinsic semiconductor

Basically semiconductor are of two types depending on their purity Intrinsic semiconductor and extrinsic semiconductor.  The pure form of semiconductor called intrinsic semiconductor and semiconductor having some impurities called extrinsic semiconductor. At zero temperature the valence band of intrinsic semiconductor is completely filled and the conduction band is completely empty. If we apply some temperature then the valance electrons are jump to the conduction band and leves holes in the valance band. That’s why whenever we increase the temperature resistance decrease and conduction increase. We add impurity in the semiconductor to increase the number of free electrons and holes

Intrinsic semiconductor

Extrinsic semiconductor

1) Intrinsic semiconductors are pure form semiconductors.

2) The electric conduction in the intrinsic semiconductors is depends on the temperature.

3) Due to minority carriers of electrons intrinsic semiconductors have poor conductivity.

4) In intrinsic semiconductor the number of electrons and number of holes is same.

5) Intrinsic semiconductors are not further classified.

6) In intrinsic semiconductors the band gap between valance band and conduction band is small.

1) The extrinsic semiconductor have some impurities.

2) The electric conduction in extrinsic semiconductor is depends on the doping an temperature.

3) Due to majority carriers of electrons extrinsic semiconductors have better conductivity of electricity.

4)In extrinsic semiconductor the majority carriers are electrons and minority carriers are holes.

5) the extrinsic semiconductors are further classified into n-type and p-type semiconductors.

6) The energy gap is higher between valance band and conduction band.

Updated: February 10, 2022 — 7:13 pm

Leave a Reply

Your email address will not be published. Required fields are marked *