The contact electric field in the depletion region of a p-n junction is produced by:
A)electrons in the conduction band alone
B)holes in the valence band alone
C)electrons and holes together
D)charged replacement atoms
E)an applied bias potential difference

Question

Quizplus · Accepted Answer

The contact electric field in the depletion region of a p-n junction is produced by charged replacement atoms, also known as ionized donor and acceptor impurities. When the p-type and n-type materials are joined, electrons from the n-type region recombine with holes in the p-type region, leaving behind charged ions that create the electric field.

The Contact Electric Field in the Depletion Region of a P-N