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

Organic chemistry, synthesis of di and tri substituted benzenes(symmetrical...

synthesis of di and tri substituted benzenes(symmetrical tribromo benzene, 2-amino-5methylphenol, 3-nitro-4-bromobenzoic acid, 3,4-dibromonitrobenzene, 1,2,3-trimethyl benzene) sta

Resonance effect or mesomeric effect - Difference be, what is the Differenc...

what is the Difference between Mesomerism and Resonance

DTA, interpretation ande of errors in differential thermal analysis

interpretation ande of errors in differential thermal analysis

Equivalent weight, what is the equivalent weight of Ca in Ca3(PO4)2?

what is the equivalent weight of Ca in Ca3(PO4)2?

Determine the conversion of eo for a cstr, Close to 12.2 billion metric ton...

Close to 12.2 billion metric tons of ethylene glycol (EG) were produced in 2000, which ranked it the twenty-sixth most produced chemical in the nation that year on a total mass bas

What do you understand by canning, Q. What do you understand by Canning? ...

Q. What do you understand by Canning? Canning involves the application of heat that is high enough to destroy all pathogenic microorganisms and their spores present along with

Number of unpaired electrons in the ground state, Number of unpaired electr...

Number of unpaired electrons in the ground state of beryllium atom is: (1) 2        (2) 1        (3) 0        (4) All the above Ans: 0

Solid state and quantum chemistry, What are laws of crystallography? How do...

What are laws of crystallography? How does it help in study of crystal structure?

Static light scattering, The table below gives intrinsic viscosity values e...

The table below gives intrinsic viscosity values explained by viscometry and weight- average molar mass values explained under the similar  conditions by static light scattering

Iupac system of nomenclature of complex compounds, IUPAC system of nomencla...

IUPAC system of nomenclature of complex compounds The naming of any organic compound relies on the name of normal parent hydrocarbon from that it has been derived. IUPAC system

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