Under the action of an electric field,
these holes move towards negative potential
giving the hole current, Ih The total current, I is
thus the sum of the electron current Ie and the
hole current Ih:
I = Ie + Ih
(14 2)
It may be noted that apart from the process of generation of conduction
electrons and holes, a simultaneous process of recombination occurs in
which the electrons recombine with the holes At equilibrium, the rate of
generation is equal to the rate of recombination of charge carriers