Difference Between P Type And N Type Semiconductor Pdf

difference between p type and n type semiconductor pdf

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The various factors like doping element, nature of doping element, the majority and minority carriers in the p-type and n-type semiconductor. The density of electrons and holes, energy level and Fermi level, the direction of movement of majority carriers, etc.

The Doping of Semiconductors

Both p and n are the basic semiconductors arrived from the concept of doping. Hence the basic difference between p and n-type is the way or the nature of the doping involved. Semiconductors can be differentiated as intrinsic and extrinsic as per the matter of purity concerned. P-type and N-type semiconductors come under extrinsic semiconductors. Although they are categorized under the same category of extrinsic there behaviors are extremely different based on its dopants.

However, they have Fermi levels lying towards conduction or valence band based on its type. Hence the n-type preferably carries a negative charge. So here the density of electrons is comparatively greater than that of holes. One can easily analyze that basic P-type is considered majority as holes and as its charge is positive it is abbreviated as P-type.

Whereas the carrier concentration of electron is more in n-type it is abbreviated because of its negative charge in it. Hence the densities of particular charges are also dependent on its types of semiconductors. In this article, the basic differences involved in P-type and N-type semiconductors are classified is described. The factors such as Fermi levels, energy levels based on the types they move towards either conduction band or valence band is clearly observed.

As the p-type and n-type is distinguished based on its addition of a type of impurity the existence of majority and minority carriers and the polarities are classified.

As per the concentration concerned its density is described. Your email address will not be published. Formation of P-Type Semiconductor. Formation of N-Type Semiconductor.

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Difference between p type and n type semiconductors

An extrinsic semiconductor is one that has been doped ; during manufacture of the semiconductor crystal a trace element or chemical called a doping agent has been incorporated chemically into the crystal, for the purpose of giving it different electrical properties than the pure semiconductor crystal, which is called an intrinsic semiconductor. In an extrinsic semiconductor it is these foreign dopant atoms in the crystal lattice that mainly provide the charge carriers which carry electric current through the crystal. The doping agents used are of two types, resulting in two types of extrinsic semiconductor. An electron donor dopant is an atom which, when incorporated in the crystal, releases a mobile conduction electron into the crystal lattice. An extrinsic semiconductor which has been doped with electron donor atoms is called an n-type semiconductor , because the majority of charge carriers in the crystal are negative electrons.

Both p and n are the basic semiconductors arrived from the concept of doping. Hence the basic difference between p and n-type is the way or the nature of the doping involved. Semiconductors can be differentiated as intrinsic and extrinsic as per the matter of purity concerned. P-type and N-type semiconductors come under extrinsic semiconductors. Although they are categorized under the same category of extrinsic there behaviors are extremely different based on its dopants.


Thus when we add a small amount of pentavalent impurity to an intrinsic semiconductor, it is called as n type semiconductor. Similarly when we add a small.


I. P-Type, N-Type Semiconductors

About Contact Privacy Policy Disclaimer. Difference between p type and n type semiconductors Raushan Raj Semiconductors. Intrinsic Semiconductor : Intrinsic Semiconductor means a pure semiconductor i.

We know that the p-type and n-type semiconductors come under extrinsic semiconductors. The classification of the semiconductor can be done based on doping like intrinsic and extrinsic as per the matter of purity concerned. There are many factors that generate the main difference between these two semiconductors.

Difference Between p Type and n Type Semiconductor

Here we will see the difference between N-type and P-type semiconductors. We also see the definition of p type and n type semiconductor. Let see,. As previous we What is semiconductor? There are mainly two types of semiconductor, we can divide into,. A semiconductor that contains some impurities is called extrinsic semiconductor. After adding some impurities in the pure semiconductor, we can improve some properties of semiconductor material.

The process of purposefully adding impurities to materials is called doping; semiconductors with impurities are referred to as "doped semiconductors". In a pure intrinsic Si or Ge semiconductor, each nucleus uses its four valence electrons to form four covalent bonds with its neighbors see figure below. Since there are no excess electrons or holes In this case, the number of electrons and holes present at any given time will always be equal. An intrinsic semiconductor.

Content: P-Type Vs N-Type Semiconductor

The addition of a small percentage of foreign atoms in the regular crystal lattice of silicon or germanium produces dramatic changes in their electrical properties, producing n-type and p-type semiconductors. Pentavalent impurities Impurity atoms with 5 valence electrons produce n-type semiconductors by contributing extra electrons. Trivalent impurities Impurity atoms with 3 valence electrons produce p-type semiconductors by producing a " hole " or electron deficiency. The addition of pentavalent impurities such as antimony, arsenic or phosphorus contributes free electrons, greatly increasing the conductivity of the intrinsic semiconductor. Phosphorus may be added by diffusion of phosphine gas PH3. The addition of trivalent impurities such as boron, aluminum or gallium to an intrinsic semiconductor creates deficiencies of valence electrons, called "holes". It is typical to use B 2 H 6 diborane gas to diffuse boron into the silicon material.

Both p-type and n-type semiconductor is the classification of extrinsic semiconductors. The major factor that generates a difference between p-type and n-type semiconductor lies in their doping material. A p-type semiconductor material is formed by the addition of group III elements or we can say trivalent impurity to a pure intrinsic semiconductor. On the contrary, the n-type semiconductor material is formed by the addition of group V elements i. Some other factors also exist that generates major differences between the two. We will discuss these differences in detail but before proceeding towards that have a look at the contents that are to be discussed under this article.

Extrinsic semiconductor

К несчастью для того, кто это придумал, коммандер Стратмор не нашел в этой выходке ничего забавного.

Клушар проснулся лишь на несколько секунд. Он успел бы вскрикнуть от боли, если бы сильная рука не зажала ему рот. Старик не мог даже пошевелиться. Он почувствовал неимоверный жар, бегущий вверх по руке. Нестерпимая боль пронзила плечо, сдавила грудь и, подобно миллиону осколков, вонзилась в мозг.

Сьюзан двигалась как во сне. Подойдя к компьютеру Джаббы, она подняла глаза и увидела своего любимого человека.

ГЛАВА 61 Джабба лежал на спине, верхняя часть туловища скрывалась под разобранным компьютером. Во рту у него был фонарик в виде авторучки, в руке - паяльник, а на животе лежала большая схема компьютера. Он только что установил новый комплект аттенюаторов на неисправную материнскую плату, когда внезапно ожил его мобильный.

Difference between P-type Semiconductor and N-type Semiconductor

2 COMMENTS

Teladihum

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The impurity added in.

Danny R.

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Semiconductors are materials that have properties of both normal conductors and insulators.

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