Purchase Solution

Fermi Function versus Energy

Not what you're looking for?

Ask Custom Question

Sketch, using either Matlab or Excel on the same axes, the energy/probability distribution curve for n-type silicon at two temperatures T1 and T2 (where T2 > T1) to show the effect of temperature upon the position of the Fermi level. (Hint: where would the Fermi level be if all the silicon atoms contributed a hole-electron pair?).

Fermi function f(E) specifies how many of the existing states at the energy E will be filled with an electron, or equivalently, f(E) specifies ,under equilibrium conditions, the probability that an available states at an energy E will be occupied by an electron. Mathematically speaking the Fermi function is simply a probability density
function. in mathematical symbols,

f(E) = 1/( 1+exp (E-Ef)/kT )

where,
Ef=Fermi energy of Fermi level
K=boltzmann constant
T=temperature

Attachments
Purchase this Solution

Solution Summary

The expert examines fermi functions versus energy.

Solution Preview

See the 2 attachments. First with some explanation and some other references, the second the f(E) plots using Si at 50K, 300K and 1000K. Using the Excel you can enter in the relevant cells any temperature in K you want and the resultant plot should be produced. You will need to change the legend filed as well though which are referenced under the actual plot.

Fermi Energy ...

Purchase this Solution


Free BrainMass Quizzes
Introduction to Nanotechnology/Nanomaterials

This quiz is for any area of science. Test yourself to see what knowledge of nanotechnology you have. This content will also make you familiar with basic concepts of nanotechnology.

Intro to the Physics Waves

Some short-answer questions involving the basic vocabulary of string, sound, and water waves.

The Moon

Test your knowledge of moon phases and movement.

Classical Mechanics

This quiz is designed to test and improve your knowledge on Classical Mechanics.

Variables in Science Experiments

How well do you understand variables? Test your knowledge of independent (manipulated), dependent (responding), and controlled variables with this 10 question quiz.