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Distinguish Between 'Intrinsic' and 'Extrinsic' Semiconductors - Physics

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Distinguish between 'intrinsic' and 'extrinsic' semiconductors

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Solution

Intrinsic Semiconductor Extrinsic Semiconductor
It is a pure semiconductor material with no impurity atoms in it. It is prepared by doping a small quantity of impurity atoms to the pure semiconductor.
The number of free electrons in the conduction band and the number of holes in valence band is exactly equal. The number of free electrons and holes is never equal. There is an excess of electrons in n-type semiconductors and an excess of holes in p-type semiconductors.
Concept: Extrinsic Semiconductor
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