P-n junction, Electrical Engineering

Assignment Help:

P-N Junction 

A p-n junction is made by joining P-type and N-type semiconductors together in extremely close contact. The word junction consider to the boundary interface in which the 2 regions of the semiconductor meet. If they were constructed of two separate pieces this would bring in a grain boundary, thus p-n junctions are formed in a single crystal of semiconductor by doping, for instance by ion implantation, diffusion of dopants, or through epitaxy (growing a layer of crystal doped with one kind of dopant on top of a layer of crystal doped with another sort of dopant).

P-N junctions are elementary "building blocks" of approximately all semiconductor electronic devices like diodes, transistors, solar cells, LEDs, and integrated circuits; they are the active sites in which the electronic action of the device occurs. For instance, a common sort of transistor, the bipolar junction transistor, contains two p-n junctions in series, in the make n-p-n or p-n-p.

493_P-N Junction.png

Generally, p-n junctions are manufactured from a single crystal with dissimilar dopant concentrations diffused across it. Forming a semiconductor from two separate pieces of material would introduce a grain boundary among the semiconductors that severely inhibits its utility by scattering the electrons and holes. Though, in the case of solar cells, polycrystalline silicon is frequently employed to reduce expense, despite the lower efficiency.


Related Discussions:- P-n junction

What are the modes used in display modes, What are the modes used in displa...

What are the modes used in display modes? 1. Left Entry mode In the left entry mode, the data is going into from the left side of the display unit. 2. Right Entry Mode

Calculate the thermal velocity of an electron, Question: a) Describe t...

Question: a) Describe two mechanisms by which electrons can be excited from the valence band to the conduction band? b) Given that the direct-band gap energy for Gallium N

What do you mean by negative clamper, Q. What do you mean by Negative Clamp...

Q. What do you mean by Negative Clamper? During the positive half cycle the diode conducts and acts like a short circuit. The capacitor charges to peak value of input voltage V

Determine the percentage drop in load current, Q. A practical current sourc...

Q. A practical current source is represented by an ideal current source of 200 mA along with a shunt internal source resistance of 12 k. Determine the percentage drop in load curr

D.c. generator, D.C. Generator A magnetic field is produced by af...

D.C. Generator A magnetic field is produced by afield coil supplied with a D.C. current and a rotor is placed between shaped pole pieces and wound with an armature wind

Show example on residential wiring, Q. A person, while driving a car in a c...

Q. A person, while driving a car in a cyclone and waiting at an intersection, hears a thumping sound when a power line falls across the car and makes contact with the chassis. The

Tunneling effect, what is tunneling effect ? With calculation.

what is tunneling effect ? With calculation.

Metals, Metals, Semiconductors, and Insulators For electrons...

Metals, Semiconductors, and Insulators For electrons to move within an applied electric field there have to be states available to them. A totally filled band ca

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