Why do hole carriers present in n-type semiconductor?

Asked by Topperlearning User | 4th Jun, 2014, 01:23: PM

Expert Answer:

Due to the addition of pentavalent impurity, n-type material has a large number of free electrons. However, even at room temperature, some of the covalent bond breaks, thus releasing an equal number of free electrons and holes. Therefore n-type material has a large number of free electrons and a small number of holes.

Answered by  | 4th Jun, 2014, 03:23: PM