Does Fermi Energy Depends on Temperature?

The experiment shows that the Fermi level decreases with increasing temperature and has almost the same temperature dependence as the energy gap. It is pinned at about 0.63 of energy gap below the conduction band.

How does Fermi energy vary with temperature?

As temperature increases the intrinsic holes dominate the acceptor holes. Hence the number of intrinsic carriers in the conduction band and in the valence band become nearly equal at high temperature. The fermi level EFp gradually shifts upwards to maintain the balance of carrier density above and below it.

What are the factors on which Fermi energy depends?

the nature and concentration of the impurity in the semiconductor; 2. the temperature. These two factors make the Fermi level moveable within the energy spectrum.