Difference Between p-Type and n-Type Semiconductor In a p-type semiconductor, the III group element of the periodic table is added as a doping element, whereas in n-type the V group element is the doping element.
Trivalent impurity like Aluminium, Gallium, and Indium is added in the p-type semiconductor, while in the n-type semiconductor Pentavalent impurity like Arsenic, Antimony, Phosphorus, Bismuth, etc.
The impurity added in p-type semiconductor provides extra holes known as Acceptor atom, whereas in n-type semiconductor impurity provides extra electrons and termed as Donor atom. In a p-type semiconductor, the majority carriers are holes, and the minority carriers are electrons. In the n-type semiconductor, electrons are majority carriers, and holes are minority carriers.
Your email address will not be published. Save my name, email, and website in this browser for the next time I comment. Post comment. Skip to content. Facebook page opens in new window Twitter page opens in new window Instagram page opens in new window YouTube page opens in new window. Difference between N and P Type Semiconductors. Related Posts. The figure below represents the doping of phosphorus element into a pure silicon material:. We already know that phosphorus consists of 5 electrons at its valence shell.
When it is doped with pure silicon having 4 electrons at the valence shell then it forms 4 covalent bonds. This leads to the presence of an unbounded electron that is held free to move into the conduction band.
This electron is known as a free electron and its movement raises the conductivity of the material. Here, from the figure, it is clear that the existence of the Fermi level is near the conduction band.
We can see that the small energy difference exists between donor energy level and the conduction band. So, less energy is needed by the electrons to reach the conduction band. So, from the above discussion, we can conclude that a p-type semiconductor is abbreviated so because these are positive semiconductors due to presence of extra holes.
Whereas, n-type semiconductors are termed as negative semiconductors because of the presence of extra electrons. Your email address will not be published. Examples of pentavalent impurities are phosphorus or arsenic which also called as donor impurities. P-type semiconductor: When Trivalent impurity uses for doping then it creates some vacancy of electrons Holes in semiconductor called P-type semiconductor or acceptor. Examples of trivalent impurities are aluminum, boron which also called as acceptor impurities.
P-type semiconductor is formed by adding trivalent impurities and N-type semiconductor is formed by adding pentavalent impurities in the semiconductor. We can also refer to this as a difference between electron donors and acceptors. We saw the definition of p-type and n-type semiconductors. If you have any doubts related to this topic feel free to ask in the comment section.
Your email address will not be published. Skip to content Search for:. Let see, Introduction As previous we What is semiconductor? There are mainly two types of semiconductor, we can divide into, Intrinsic semiconductor Extrinsic semiconductor A semiconductor that is in extremely pure form is called an intrinsic semiconductor.
Key difference: When Trivent impurities are added in the semiconductor, a P-type semiconductor formed. In n-type semiconductor, the V group element is added as a doping element.
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