Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Differentiate between extrinsic and intrinsic semiconductor. Obtain an expression for the carrier concentration for an intrinsic semi-conductor. Also demonstrate that Fermi level in an intrinsic semiconductor lies approximately half way between the top of valence band and the bottom of conduction band.
In intrinsic semiconductors, conduction is because of intrinsic processes characteristics of crystal, without influence of impurities. A pure crystal of silicon or germanium is an intrinsic semiconductor. Electrons which are excited from the top of the valence band to the bottom of the conduction band by thermal energy are responsible for conduction. Number of electrons excited across the gap can be calculated from the Fermi-Dirac probability distribution. In extrinsic semiconductors, conduction is because of the presence of extraneous impurities. Process of deliberate addition of controlled quantities of impurities to a pure semiconductor is known as doping. Addition of impurities markedly increases the conductivity of a semiconductor. Conductivity of an intrinsic semiconductor depends on concentration of charge carriers, ne and nh. Mobility of conduction electrons and holes µe and µh can be defined as drift velocity acquired by them under unit field gradient. The conductivity σ of a semiconductor can be written
Fractional distillation - Purification of organic compounds This method is used to separate a mixture of two or more miscible liquids that have boiling points close to each oth
how to make project on iodoform?
how do you calculate the mass atomic number of an element?
If a mole were to have 1*10^24 particles what is the weight of one mole of oxygen molecule and 1 molecule of oxygen Ans) Since the gram molecular mass remains the similar...weig
What is hydrometallurgy
Branches of organic chemistry
description about an electron''s movement
Tritium is the isotope of: (1) Hydrogen (2) Oxygen (3) Carbon (4)Sulpher Ans: Hydrogen
Q. Illustrate Egg White Foams? Egg white foams when whipped or beaten, the air gets entrapped in the liquid present, and an interfacial tension is established between the ai
what are moles?
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!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd