The band gap energy is 1.12 eV.

At any temperature T>0K in an intrinsic semiconductor a number of electrons are found in the conduction band and the rest of the valence electrons are left behind in the valence band.

$N = n_c+n_V$

$f(E_C )= 1/(1+e^{((E_C-E_F)/kT) })$ ………………………(1)

$f(E_v )= 1/(1+e^{(-(E_C-E_F)/kT)} )$ ………………………(2)

$n_V=Nf(E_v )= N/(1+e^{(-(E_C-E_F)/kT)} )$

$N …