The probbility of electrons to be found in the conduction band of an intrinsit semiconductor at a finile temperature

Options

A. increases exponentially with increasing band gap
B. decreases exponentially with increasing band gap
C. decreases with increasing temperature
D. is independent of the temperature and band gap.

Answer

B

Explanation

If band gap is increased, the probablity of electrons to be found in the conduction band decreases exponentially. It is so because it will be more difficult for the electron to cross over the band gap while going from valence band to conduction band.