The Fermi level in a p-type semiconductor lies close to

The Fermi for a p-type semiconductor lies closer to the valence band as shown:

Similarly, the Fermi level for an n-type lies near the conduction band as shown:

• As the temperature increases above zero degrees, the extrinsic carriers in the conduction band and the valence band increases.
• Since the intrinsic concentration also depends on temperature, ni also increases. But for small values of temperature, the extrinsic concentration dominates in comparison to the intrinsic concentration.
• As the temperature continues to increase, the semiconductor starts to lose its extrinsic property and becomes intrinsic, as ni becomes comparable to the extrinsic concentration.

The Fermi-level in an intrinsic semiconductor is nearly midway between the conductive and valence band as shown:

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