Majority and minority charge carriers , Physics

Assignment Help:

Majority and minority charge carriers 

A pure semiconductor has equal number of holes and electrons. But an extrinsic semiconductor has majority charge carriers.


When a trivalent impurity is introduced into a semiconductor substance, every impurity atom leaves an electron deficiency called ‘hole' along with thermally generated holes and electrons. Some of the electrons recombine with holes, so the number of electrons get reduced. Hence holes become majority charge carriers as they are large in number and electrons become minority charge carriers. When a pentavalent impurity is added, every impurity atom leaves an electron in addition to the existing number. 

Some of the electrons and holes recombine. This results in number of holes to reduce and number of electrons increase. Hence electrons become majority charge carriers and holes become minority charge carriers.


Related Discussions:- Majority and minority charge carriers

Series combination of the three resistors, Regard as three resistors having...

Regard as three resistors having three unique values of resistance. Presume the resistors are connected in series with each other. Additional suppose that the series combination of

What are stark and zeeman effects, Q. What are Stark and Zeeman effects? ...

Q. What are Stark and Zeeman effects? It is found that while electric or magnetic field is applied to the atom all of the spectral line split into several lines. The former ef

Find effectual capacitance, Q. Three capacitors every of capacitance 3 pF a...

Q. Three capacitors every of capacitance 3 pF are connected in parallel. Find effectual capacitance. The effectual capacitance Cp = C1 + C2 + C3 = 9 + 9 + 9 = 27 pF

Define the formula of wien law, Define the formula of Wien law. WIEN'S ...

Define the formula of Wien law. WIEN'S LAW: λ m T = constant Here: λ m = Peak Wavelength (m) T = Surface Temperature (K) Constant = 2.898 x 10 -3 mK It

Luxon, luxon: A particle which solely travels at c (the speed of light...

luxon: A particle which solely travels at c (the speed of light in vacuum). All of the luxons have a rest mass of zero exactly. Though they are massless, luxons carry momentum

Moment of inertia, A non-uniform rod AB has a mass M and length 2l.The mass...

A non-uniform rod AB has a mass M and length 2l.The mass per unit lengthof the rod is mx at a point of the rod distant x from A. find the moment of inertia of this rod about an axi

Explain electric potential inside hollow conducting shell, Five coulombs of...

Five coulombs of charge are placed on a thin-walled conducting shell. Once the charge has come to rest, the electric potential inside the hollow conducting shell is found to be:

Using which law induced electric currents can be explained, Induced electri...

Induced electric currents can be explained using which of the following laws? a) Gauss's Law b) Faraday's Law c) Ohm's Law d) Ampere's Law Ans: Induced e

Determine the velocity of a wave frequency, The frequency of a wave is 50 H...

The frequency of a wave is 50 Hertz and its wavelength is 25 meters. What is the velocity of this wave? Ans: The velocity of given wave is 1250 meters/second.

Relation between a proton and an alpha particle, A proton and an alpha part...

A proton and an alpha particle pass by the gap of a strong magnet.  If both particles have the similar initial velocity, how many times greater will the defection of the proto

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd