Question

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

Answer 1

Semiconductor materials whose electrical conductivity is enhanced by adding of some impurities are called extrinsic semiconductors.

n-type semiconductor	p-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.