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

1, Briefly tell me about chemical combination and its laws

Briefly tell me about chemical combination and its laws

Laboratory apparatus in inorganic chemistry, what are the laboratory appara...

what are the laboratory apparatuses used in inorganic chemistry ?

Calculate the enthalpy of a system, Q. Define Enthalpy and Calculate the En...

Q. Define Enthalpy and Calculate the Enthalpy of a system? Ans. Enthalpy is a measure of the total energy content of a system.  It is represented by a big H. Change in ent

Conductometry, what is conductometry and how it work

what is conductometry and how it work

Define processing of cereals, Processing of Cereals Owing to the low m...

Processing of Cereals Owing to the low moisture content, cereals and pulses are relatively stable during storage; and processing is not so much for preservation. However, proc

#title.simple and steam distillation., name 5 organic compound that can be ...

name 5 organic compound that can be purify using simple distillation

Atom, which of the properties of atoms of elements is the whole number/

which of the properties of atoms of elements is the whole number/

Rehydration tests for the dried sample, Q. Rehydration tests for the dried ...

Q. Rehydration tests for the dried sample? • gain knowledge about the sensory changes that take place during the dehydration of the samples, and • learn about the effectiv

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