Difference Between Intrinsic semiconductor and extrinsic semiconductor
| Intrinsic Semiconductors | Extrinsic Semiconductors |
|---|---|
| 1. Intrinsic semiconductors are the crystals of pure elements like germanium and silicon. | 1. When some impurity is added in the intrinsic semiconductor, we get an extrinsic semiconductor. |
| 2. In intrinsic semiconductor, the number density of electrons is equal to the number density of holes. i.e., $n_e = n_h$. | 2. In extrinsic semiconductor, the number density of electrons is not equal to the number density of holes. i.e., $n_e \neq n_h$. |
| 3. The electrical conductivity of intrinsic semiconductors is low. | 3. The electrical conductivity of extrinsic semiconductors is high. |
| 4. Resistivity is higher. | 4. Resistivity is lower. |
| 5. The electrical conductivity of intrinsic semi-conductors mainly depends on their temperatures. | 5. The electrical conductivity of extrinsic semi-conductors depends on the temperature as well as the amount of impurity added in them. |