Question
Physics Question on Semiconductor electronics: materials, devices and simple circuits
Which of the following elements when added as an impurity into the germanium produces a p-type semiconductor?
A
P
B
As
C
Al
D
Sb
Answer
Al
Explanation
Solution
A p-type semiconductor is obtained when Si or Ge is doped with a trivalent impurity like indium (In), boron (B), aluminium (Al) etc. whereas an n-type semiconductor is obtained when Si or Ge is doped with a pentavalent impurity like arsenic (As), antimony (Sb), phosphorous (P) etc.