| 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 |
