When you join a p-type semiconductor with an n-type semiconductor to form a p-n
ID: 1336089 • Letter: W
Question
When you join a p-type semiconductor with an n-type semiconductor to form a p-n junction, holes initially flow from the p-type material into the n-type material, and electrons flow in the opposite direction. Why?
a) There is an electric field because of the positive charge in the p-type material and the negative charge in the n-type material.
b)Each diffuses into the region where it is at lower concentration.
c)The n-type material is at lower potential.
d)The n-type material is at higher potential.
Explanation / Answer
As we join the P-type semiconductor with the n-type semiconductor to form a p-n junction, holes from P-type semiconductor tends to diffuse towards the n-type semicondutor and electrons from n-type semiconductor tends to diffuse towards P-type semiconductor so as to balance the concentration of holes and electrons on both side.
b)Each diffuses into the region where it is at lower concentration.