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difference between extrinsic and intrinsic semiconductor

 Hi,

A pure semiconductor is also called intrinsic semiconductor. Number of holes and/or electrons in an intrinsic semiconductor is very less.
A semiconductor doped with elements like aluminum or phosphorus to increase the number of conduction holes and/or electrons is called extrinsic semiconductor. The number of majority carriers in this type of semiconductor is higher.

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 intrinsic semiconductor is an un-doped semiconductor, in which there is no impurities added where as extrinsic semiconductor is a doped semiconductor, which has impurities in it. Doping is a process, involving adding dopant atoms to the intrinsic semiconductor, there by gives different electrical characteristics


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