Which of the following when added as an impur | vedclass

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(B) To produce an $n-$type semiconductor,we need to dope the intrinsic semiconductor (Silicon) with a pentavalent impurity atom.Silicon $(Si)$ is a gr

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$P$

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(B) To produce an $n-$type semiconductor,we need to dope the intrinsic semiconductor (Silicon) with a pentavalent impurity atom.Silicon $(Si)$ is a group $14$ element with $4$ valence electrons.Pentavalent atoms have $5$ valence electrons.Among the given options,Phosphorus $(P)$ is a group $15$ element (pentavalent).When $P$ is added to $Si$,$4$ of its valence electrons form covalent bonds with $Si$ atoms,and the $5$th electron becomes a free charge carrier,resulting in an $n-$type semiconductor.Boron $(B)$ and Aluminium $(Al)$ are group $13$ elements (trivalent) and produce $p-$type semiconductors.

Which of the following when added as an impurity into silicon produces $n-$type semiconductor?

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