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

Vernier caliper, Write the expetiment of vernier caliper?

Write the expetiment of vernier caliper?

Capacitor, explain the capacitance of spherical capacitor when the inner su...

explain the capacitance of spherical capacitor when the inner surface is earthed

Explain about intrinsic and extrinsic semiconductor, Q. Dissimilarity betwe...

Q. Dissimilarity between an intrinsic and extrinsic semiconductor? Answer:- Semiconductors permit only a little amount of light to pass through them. They are of two n-kin

Define potential difference, In an electric field difference among potentia...

In an electric field difference among potential energy of two points A and B is described as equal to the amount of work done (by external agent) in moving a unit positive charge f

Astrophysics question, consider a star orbitining in the sperically graviat...

consider a star orbitining in the sperically graviational potential Y=(Vc)2 ln(r/r0). a)use conservation of energy and angular momentum to obtain equation for dr/dt and d(teta)/dt

Write the equation of an equipotential line, The equation of an equipotenti...

The equation of an equipotential line in an electric field is y=2x then the electric field strength vector at (1,2) may be?

Transistors, Construction of Depletion type of MOSFET

Construction of Depletion type of MOSFET

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