Explain term depletion layer across a p-n junction, Chemistry

Assignment Help:

Explain term 'depletion layer' across a p-n junction

Rectifying action of p-n diode can be explained on the foundation of electronic structure of the semiconductor. When a pure semiconductor is doped to become n-type, Fermi level shifts up from the middle of the energy gap towards donor level. This is so because position corresponding to 505 probability of occupation moves up because of the relatively high concentration of donor electrons in conduction band. If crystal is p-type, Fermi level shifts down towards the acceptor level. When same crystal is doped to become ntype on one side and p-type on the other side, Fermi level has to be constant throughout the crystal in thermal equilibrium. This results in electron energy levels at the bottom of the conduction band in n-part to be lower than those in the p-part, by an amount equal to contact potential eVo as demonstrated in Fig a. Contact potential at the junction gives rise to energy barrier or depletion layer.

 

1733_deplition layer.png


Related Discussions:- Explain term depletion layer across a p-n junction

Explain the statistical experimental methods, Statistical experimental meth...

Statistical experimental methods are used in product development. In order to adopt the statistical product design or experimental method, it is necessary to understand the basic c

Show the reactions of boric oxide, Q. Show the Reactions of Boric Oxide? ...

Q. Show the Reactions of Boric Oxide? Boric oxide, B 2 0 3 , is the principal oxide of boron. It is also known as boron trioxide, boron sesquioxide and boric anhydride. It is p

Density of Interstitial compounds, why is density of interstitial compounds...

why is density of interstitial compounds less than that of parent metal ?

Ethane, Laboratory preparation of ethane

Laboratory preparation of ethane

Dual nature of particles was proposed, Dual nature of particles was propose...

Dual nature of particles was proposed by: (1) Heisenberg (2) Lowry (3) de-Broglie     (4) Schrodinger Ans:de-Broglie

#title., Assignment is diagonal between berilium and aluminium

Assignment is diagonal between berilium and aluminium

Genral chemistry, ionic equation by ionelectron method (half reaction)

ionic equation by ionelectron method (half reaction)

Which bond is more strong covalent or ionic .and why? , Generally ionic bon...

Generally ionic bonds are stronger than covalent bonds. This is because in ionic bonds, electrostatic forces of attractin are involved. The positive ion (cation) and the negative

Dislocations - linear defects, Dislocations-Linear Defects           Di...

Dislocations-Linear Defects           Dislocations are abrupt alters in the regular ordering of atoms, along a line (dislocation line) in the solid. They occur in high density a

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