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What kind of semiconductor is formed when phosphorus is added to silicon?

What kind of semiconductor is formed when phosphorus is added to silicon? Correct Answer N-type

A semiconductor is a solid substance that has a conductivity between an insulator and metals. Semiconductors have conductivity due to many factors like the addition of an impurity or because of temperature effects.

N-type semiconductors: An extrinsic semiconductor where the dopant atoms provide extra conduction electrons to the host material like Phosphorus (P) in Silicon Si called donor impurities.

This creates an excess of negative (n-type) electron charge carriers that are able to move freely.

 

In the donor replacement atom, the outermost shell ( valance shell) contains 5 electrons.

Example: Phosphorus (P) etc.

Important Points

P-type semiconductors: A semiconductor, when the impurity (acceptor) with tri valency is added to pure semiconductors, then it is known as a p-type semiconductor.

Impurities with tri valency such as Boron (B), Gallium (Ga), Indium(In), Aluminium(Al), etc are called acceptor impurity.

In the acceptor replacement atom, the outermost shell (valance shell) contains 3 electrons.

Example: Boron (B), Gallium (Ga), Indium (In), Aluminium (Al), etc.

So, the value of the valance electron is 3.

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