Question

In a semiconductor doped with phospohrous the Fermi–level is 0.3 eV below condition band 27°C. The temperature is raised by 30°C. The new Fermi–level is

(1) 0.14 eV below conduction band

(2) 0.27 eV below conduction band

(3) 0.63 eV below conduction band

(4) 0.3 eV below conduction band

Answer 1

(2) 0.27 eV below conduction band

The doped semiconductive is a n–type semiconductor. The position of Fermi–level below conduction band is inversly proportional to the temperature of material on Kelvin scale. Given