Calculate the approximate donor binding energy, Electrical Engineering

Assignment Help:

Calculate the approximate donor binding energy

Calculate the approximate donor binding energy for Si (r = 11.7,mxn= 1.18 m0)

Solution: From E= m*nq4 / 2(4 πε0εr)2 [h/(2 π)]2 we have

1583_Calculate the approximate donor binding energy.png

= 1.867 x 10-20 J = 0.117 eV.

Note:  The  effective  mass  used  here  is  an  average  of  the  effective  mass  in  different crystallographic directions, and is termed as the "conductivity effective mass" with values of 1.28 m0 (at 600 K), 1.18 m0 (at 300 K), 1.08 m0 (at 77 K), and 1.026 m0  (at 4.2 K).

  1. In III-V compounds, column VI impurities (e.g., S, Se, Te) that occupying column V sites act as donors. Similarly, column II impurities (e.g., Be, Zn, Cd) that occupying column III sites act as acceptors.
  2. When a column IV material (e.g., Si, Ge) is used to dope III-V compounds, then they might substitute column III elements (and act as donors), or substitute column V elements   (And act as acceptors) => amphoteric dopants.
  3. Doping  creates a  large change  in  the electrical  conductivity,  e.g.,  with a doping  of 1015/cm3 , the resistivity of Si changes from 2 x 105 Ω-cm to 5 Ω -cm.

Related Discussions:- Calculate the approximate donor binding energy

Two converters - boost-buck (cuk) and flyback, Design two converters - boos...

Design two converters - boost-buck (Cuk) and flyback meeting the following criteria: Vin = 15 V ... 35 V    Vout = 25 V Output voltage ripple 1% peak to peak Switching frequen

What do you mean by magnetic circuits, Q. What do you mean by Magnetic circ...

Q. What do you mean by Magnetic circuits? A magnetic circuit provides a path for magnetic flux, just as an electric circuit provides a path for electric current.Magnetic circui

Speed control of three phase induction motors , Speed  Control of Three  ...

Speed  Control of Three  Phase Induction Motors Three  phase  induction motors are invariably used in the application where in speed in  required to be  constant  or adjustabl

Power system model, #i have an error at in the Matlab power system model..t...

#i have an error at in the Matlab power system model..thus i couldn''t run it...

Determine the force applied to the plunger by system, Q. For the electromag...

Q. For the electromagnet shown in Figure, the λ-i relationship for the normalworking range is given by i = aλ 2 + bλ(x -d) 2 ,where a and b are constants. Determine the force app

Mainframes - introduction to microprocessors , Mainframes Computers lar...

Mainframes Computers larger than minicomputer more power  operating at very high speed  called  mainframes.  They  can processes 64  bit data.  Such computers are used  in defe

State the advanatages of GPS system, Advanatages of GPS system These s...

Advanatages of GPS system These systems have been developed to mimic the knowledge and expertise of an expert in a particular field. For instance: -  prospecting for minera

Circuit theory ., it''s 3 assignments and each assignment have 7 questions ...

it''s 3 assignments and each assignment have 7 questions so each assignment have 1 hour when I open it I have only 1 hour to finish it I can show him or her the practice question t

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