The potential barrier at the p-n junction is due to the charges on the either
side of the junction. These charges are
(i) majority carriers
(ii) minority carriers
(iii) fixed donor and acceptor ions.
(iv) none of above
Answers
Answer:
The Correct Answer would be (iii) fixed donor and acceptor ions. The potential barrier at the p-n junction is due to charges on either sides of junctions and they are commonly referred to as Donor and Acceptor ions.
Explanation:
When an N-type semiconductor is joined to a P-type semiconductor, a p-n junction is formed. Now, in N-type, electrons are in excess while in P-type, holes are in excess. So, being oppositely charged, they began to attract each other. As a result, many electrons and holes from their respective N and P-type semiconductors began to move and get diffused on the other side. As a result, there is a shortage of electrons on the n-type and same goes for holes on the p-type. Irony is that now electrons are in access on p-type and holes are on n-type. So, basically, these opposite charges create a barrier across p-n junction also known as potential barrier. they are known as Donor and Acceptor ions.