Assertion: The probability of electrons to be found in the conduction band of an intrinsic semicondu

Question

Assertion: The probability of electrons to be found in the conduction band of an intrinsic semiconductor at a finite temperature decreases exponentially with increase in band gap.\ Reason : It will be more difficult for the electron to cross over the large band gap while going from valence band to conduction band.

Professor PC Thomas Classes · Answer

(a) : To jump from valence band to conduction band electron needs energy equal or more than the forbidden band between these two bands. As the energy of band gap increases, it becomes difficult for electron to get that equivalent energy.