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Question

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

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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.

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