Energy band diagram, Electrical Engineering

Sketch the Fermi-Dirac distribution function, F(E), alongside the energy band diagram for an n-type semiconductor, indicating the position of the Fermi level, EF, and the donor levels.  
 
Sketch the energy band diagram for a metal, indicating the position of the Fermi level.
 
At a temperature of 300 K silicon has an energy gap of 1.1 eV. Calculate the probability that a particular electron energy state at the bottom of the conduction band for intrinsic silicon is occupied at 300 K. 

Use the expression for F(E) on the formula sheet to derive the probability that, for this semiconductor, 

i)  a state at the bottom of the conduction band is occupied at 0 K

ii)  a state at the top of the valence band is occupied at 0 K. 

Explain how the values you obtain can be deduced from physical considerations alone.

Posted Date: 2/27/2013 1:55:30 AM | Location : United States







Related Discussions:- Energy band diagram, Assignment Help, Ask Question on Energy band diagram, Get Answer, Expert's Help, Energy band diagram Discussions

Write discussion on Energy band diagram
Your posts are moderated
Related Questions
For Parity Flag  CPRE (Call  on parity even) and CPO (Call or parity  Odd) Instruction CPE calls the subroutine  from the  specified  memory  location if parity  flag is

Q. What is a heat sink? List the factors, which determine its efficiency. To reduce the chance of thermal runaway, the rise of temperature at the collector junction to a danger

Application of Microprocessors Microprocessor microcontroller based systems  may be used  in almost  every filed of life  and  their  applications  are increasing day by day

Reverse Recovery Characteristics At the end of forward  conduction in diode  reverse current  flows for  a short  time. The  device  doesn't  attain its full blocking  capabili


Buffer A buffer  is a logic circuit that  amplifies the current or power.  Basically it is used  change the driving  capability  of a logical  circuit. Therefore  it is  someti

Calibration and Testing of Energy Meters and Meter Laboratory Energy meters form a vital instrument of revenue realization for the distribution utilities. Based on the meter r

Emitter bias: Figure: Emitter bias While a split supply (dual power supply) is accessible, this biasing circuit is the very much effective, and gives zero bias vo

Scale-space pyramids   Write an m-file "scale_space.m" which computes scale space representation of an input image for a given scale "sigma" and displays them. (i) 4 scale

Illustrate about the Digital televisions Microprocessor would be used to control the below features, for instance: - Automatically tuning into television stations - allow