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

What is use of co-processor in a typical microprocessor, What is use of co-...

What is use of co-processor in a typical microprocessor based system. This is a processor that works in parallel with the major processor. This has its own set of specialized i

Fet parameters, FET Parameters A basic, low-frequency hybrid-pi model ...

FET Parameters A basic, low-frequency hybrid-pi model for the MOSFET is displayed in figure. The several parameters are as follows. is the transconductance in siemens

Disadvantages of software defined radio, Disadvantages of SDR 1. Power ...

Disadvantages of SDR 1. Power consumption is more due to rapid switching of modes 2. Hardware design is not easy 3. Software bugs exist in the system

Show the block diagram for a 3-bit ripple counter, Q. (a) For a JKFFwith JK...

Q. (a) For a JKFFwith JK = 11, the output changes on every clock pulse. The change will be coincident with the clock pulse trailing edge and the flip-flop is said to toggle, when T

Network theorems.., how to calculate voltage when 3 voltage sources are giv...

how to calculate voltage when 3 voltage sources are given?

Magnetic field due to a current carrying coil, Amperes Circuital Law states...

Amperes Circuital Law states that the line integral of the magnetic field H around a closed  path equals  the  total  current enclosed. ∫ H       dl          ∑ I   App

Traditional Model - Performance Monitoring and Control, Traditional Model -...

Traditional Model - Performance Monitoring and Control The traditional model talks only about the finance and the financial accounting model. The output are published periodic

Discuss some features of pentium series of microprocessors, Discuss some fe...

Discuss some features of Pentium series of microprocessors. The Pentium is a CISC microprocessor, 32-bit superscalar.  The term superscalar is utilized for the processor that

Emf, what is emf

what is emf

Series connected motor, In this case, the armature is connected in series w...

In this case, the armature is connected in series with the field coils. Thus I a   = I f = I         NB. At starting, the back emf is zero (because the m

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