Question
Physics Question on Semiconductor electronics: materials, devices and simple circuits
n-type semiconductor is obtained on doping intrinsic germanium by
A
gold
B
boron
C
aluminium
D
phosphorus
Answer
phosphorus
Explanation
Solution
When a small amount of pentavalent impurity is added to intrinsic germanium, it is known as n-type semiconductor. Typical examples of pentavalent impurities are arsenic, antimony, phosphorus.