What are some features of p-type semiconductors? - Vidyadip

Question

What are some features of $p-$type semiconductors?

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Answer

$1.$ These are materials doped with trivalent impurity atoms $($acceptors$).$
$2.$ Electrical conduction in these materials is due to majority charge carriers i.e., holes.
$3.$ The acceptor atoms acquire electron and become negatively charged$-$ions.
$4.$ Number of holes is very large compared to the number of free electrons. $n_h >> n_e.$ Holes are majority charge carriers.
$5.$ When energy is supplied externally, positively charged holes $($majority charge carriers$)$ and negatively charged free electrons $($minority charge carriers$)$ are available for conduction.

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