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Question
Answer the following question.
Why is the conductivity of a n-type semiconductor greater than that of p-type semiconductors even when both of these have the same level of doping?
Solution
- In a p-type semiconductor, holes are the majority charge carriers.
- When a p-type semiconductor is connected to terminals of a battery, holes, which are not actual charges, behave like a positive charge and get attracted to the negative terminal of the battery.
- During the transportation of the hole, there is an indirect movement of electrons.
- The drift speed of these electrons is less than that in the n-type semiconductors. The mobility of the holes is also less than that of the electrons.
- As electrical conductivity depends on the mobility of charge carriers, the conductivity of a n-type semiconductor is greater than that of p-type semiconductors even when both of these have the same level of doping.
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