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Question

What are extrinsic semiconductors? Write two differences between the two types of extrinsic semiconductors.


Solution

Semiconductor materials whose electrical conductivity is enhanced by adding of some impurities are called extrinsic semiconductors.
n-type semiconductorp-type semiconductor
$$1$$.It is prepared by doping with a pentavalent impurity.$$1$$. It is prepared by doping with a trivalent impurity.
$$2$$. The impurity atoms added will donate electrons.$$2$$. The impurity atoms added will accept electron.

Physics

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