What are some features of n-type semiconductor? - Vidyadip

Question

What are some features of $n-$type semiconductor?

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Answer

$1.$ These are materials doped with pentavalent impurity $($donors$)$ atoms.
$2.$ Electrical conduction in these materials is due to majority charge carriers i.e., electrons.
$3.$ The donor atom loses electrons and becomes positively charged ions.
$4.$ Number of free electrons is very large compared to the number of holes, $n_e >> n_h.$ Electrons are majority charge carriers.
$5.$ When energy is supplied externally, negatively charged free electrons $($majority charges carries$)$ and positively charged holes $($minority charges carries$)$ are available for conduction.

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