difference between intrinsic and extrinsic semiconductors pdf

Difference Between Intrinsic And Extrinsic Semiconductors Pdf

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Semiconductors are materials that possess the unique ability to control the flow of their charge carriers, making them valuable in applications like cell phones, computers, and TVs. An extrinsic semiconductor is a material with impurities introduced into its crystal lattice.

Electrical Academia. This article covers the key differences between intrinsic and extrinsic semiconductor materials on the basis of purity, conductivity, uses, energy gap, temperature, and examples. An intrinsic semiconductor is the one which is made of the extremely pure semiconductor material.

Extrinsic Semiconductors

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The Intrinsic and Extrinsic semiconductors are distinguished from each other considering various factors such as doping or the addition of the impurity, density of electrons and holes in the semiconductor material, electrical conductivity, and its dependency on various other factors. Intrinsic Semiconductor is a pure form of the semiconductor as here no addition of impurity takes place. An example of intrinsic semiconductors is Silicon Si and Germanium Ge. Your email address will not be published. Save my name, email, and website in this browser for the next time I comment. Skip to content The Intrinsic and Extrinsic semiconductors are distinguished from each other considering various factors such as doping or the addition of the impurity, density of electrons and holes in the semiconductor material, electrical conductivity, and its dependency on various other factors. Difference Between Intrinsic and Extrinsic Semiconductor In an intrinsic semiconductor, the addition of impurity with a pure semiconductor does not take place, whereas the extrinsic semiconductor is formed by the dopping of impurity in a pure semiconductor.

Difference Between Intrinsic and Extrinsic Semiconductor

A conductor has a number of charge carriers, which are ready to take part in conduction after a certain voltage or heat is applied. Non-conductors do not have any free charges to take part in conduction even after applying an external voltage or heat. The materials which exhibit properties of both conductors and non-conductors are called semiconductors. The Semiconductor materials behave as an insulator for a certain voltage level and conduct only after the specific voltage level is applied at the input. The commonly available semiconductor materials are silicon Si and Germanium Ge. The compound semiconductors are prepared by alloying different elements, one of the examples is Gallium Arsenide GaAs.

An extrinsic semiconductor is a semiconductor doped by a specific impurity which is able to deeply modify its electrical properties, making it suitable for electronic applications diodes, transistors, etc. A P-type semiconductor is an intrinsic semiconductor like Si in which an impurity acting as an acceptor like e. These impurities are called acceptors since once they are inserted in the crystalline lattice, they lack one or several electrons to realize a full bonding with the rest of the crystal. From figure 5, we see that a p-type semiconductor has a lower electron density n and a higher hole density p than the same intrinsic semiconductor. Electrons are said to be the minority carriers whereas holes are the majority carriers. In the case of a p-type material, the hole density is then close to the dopant density N A. Since the law of mass action is always true, we obtain the following expressions for the carrier densities.


the addition of impurity.


Difference Between Intrinsic and Extrinsic Semiconductor

Both intrinsic and extrinsic semiconductor is the 2 categorizations of semiconductor material. The difference between intrinsic and extrinsic semiconductor is that Intrinsic semiconductors are the pure form of semiconductor materials. Whereas extrinsic semiconductors are impure semiconductor formed by adding an impurity to a pure semiconductor.

Extrinsic semiconductor

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Difference Between Intrinsic Semiconductor & Extrinsic Semiconductor

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Introduction

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1 Comments

  1. Nadine M.

    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.

    06.05.2021 at 01:56 Reply

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