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

Single negatively charged particle a maximum, Where is the electric potenti...

Where is the electric potential because of a single negatively charged particle a maximum? Answer:  One could acquire at this one by looking at the formula for the electri

Aac (all aluminium standard conductors), AAC (All Aluminium standard Conduc...

AAC (All Aluminium standard Conductors) Standard conductors are the conductors made of thin wires of small cross-section and bunched together. They are made by twisting the wir

Explain the procedure of finding miller indices, Explain the procedure of f...

Explain the procedure of finding Miller indices. Procedure of finding Miller indices: a. The intercepts of the needed plane onto the three coordinate axes has to be founded.

Ratio of the frequency of fourth overtone, What do you mean by the ratio of...

What do you mean by the ratio of the frequency of fourth overtone to the fundamental frequency of a stretched string?

Kinematics, how to solve kinematic problems?

how to solve kinematic problems?

Write the maxwells electromagnetic equation, Write the Maxwell's electromag...

Write the Maxwell's electromagnetic equation, which follows from the non-existence of isolated magnetic pole

Distinguish between analog and digital communication, Distinguish among, an...

Distinguish among, analog and digital communication. Write any two modulation methods employed for the digital data. Explain briefly one of the techniques used.

Loschmidt constant, Loschmidt constant; Loschmidt number; NL: The numb...

Loschmidt constant; Loschmidt number; NL: The number of particles per unit volume of an ideal gas at standard temperature & pressure. It has the value 2.687 19 x 10 25 m -3 .

Significance of quasi-fermi level with aid of band diagram, Significance of...

Significance of Quasi-Fermi Level with Aid of Band Diagram (a) Explain with diagrams different types of trap assisted generation and recombination. (b) Explain the signific

Heisenberg uncertainty principle, It is explained by Heisenberg's uncertain...

It is explained by Heisenberg's uncertainty principle, it is impossible to calculate simultaneously both the position and the momentum of the particle. Let x and p be the uncert

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