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Intrinsic semiconductor

An intrinsicsemiconductor is one which is made of the semiconductor material in itspure form (Without any far-ranging doping agent present). In this kind ofsemiconductor, the variety of charge carrier is thus determined through theproperties the the product itself and not the quantity of impurities.

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It can likewise bedescribed together one in i beg your pardon the number of conduction electrons is same to the numberof holes. At room temperature, intrinsicsemiconductors exhibit virtually negligible conductivity. Due to the fact that no othertype of facet is present in that is crystalline structure.


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Extrinsic Semiconductor

An extrinsicsemiconductor is an enhanced intrinsic semiconductor in which a smallamount that impurities are included by a process referred to together doping, whichimproves that is conductivity and alters the electric properties the thesemiconductor.

The doping agents are pentavalent atoms (atoms having fivevalence electrons) or trivalent atoms (atoms having actually three valence electrons).Example that pentavalent doping atom include: antimony, arsenic, phosphorus andbismuth. ~ above the other hand, examples of trivalent doping atom include:gallium, indium, aluminium and also boron.

Extrinsic semiconductors have actually a high electricalconductivity. Uneven intrinsic semiconductor, extrinsic semiconductors are oftwo types p-type and also n-type semiconductor.

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The Difference

Doping or addition of impurities does no happenin intrinsic semiconductors conversely, a little amount of impurity is doped in apure semiconductor for ready of extrinsic semiconductor.Electrical conductivity the intrinsicsemiconductor is a role of temperature alone vice versa, the electricalconductivity of extrinsic semiconductors counts upon the temperature together wellas ~ above the impurity atoms doped in the structure.The density of electrons and holes in theintrinsic semiconductor is exact same that is, the number of cost-free electrons presentin the conduction tape is same to the number of holes in the valence band,however, in instance of extrinsic semiconductor, the variety of electrons and holesare not equal.The Fermi level in intrinsic semiconductor is atthe center of forbidden energy gap and is the same with adjust in temperature.In extrinsic semiconductor, the Fermi level shifts upward or bottom withchange in temperature.The electrical conductivity of intrinsicsemiconductors is very poor conversely, the electrical conductivity of extrinsicsemiconductor is fair good.Intrinsic semiconductors are virtually notused vice versa, extrinsic semiconductors are nearly used.The pure form of silicon and also germanium crystalis used in an intrinsic semiconductor whereas the impurity prefer arsenic,antimony, phosphorus, aluminium , indium and so on are included to the pure kind ofsilicon and also germanium to form extrinsic semiconductors.The tape gap in between conduction and also valence bandis small in intrinsic semiconductors whereas in extrinsic the band void isbigger.Intrinsic semiconductor does not have any furtherclassification vice versa, extrinsic semiconductors can be classified into ntypeand p-type.

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