Lecture4-DensityOfStatesFermiEnergi

Lecture4-DensityOfStatesFermiEnergi - Lecture 4 Density of...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
ECE 3040 - Dr. Alan Doolittle Georgia Tech Lecture 4 Density of States and Fermi Energy Concepts Reading: (Cont’d) Pierret 2.1-2.6
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
ECE 3040 - Dr. Alan Doolittle Georgia Tech How do electrons and holes populate the bands? Density of States Concept Quantum Mechanics tells us that the number of available states in a cubic cm per unit of energy, the density of states, is given by: eV cm States of Number unit E E E E m m E g E E E E m m E g v v p p v c c n n c = = 3 3 2 * * 3 2 * * , ) ( 2 ) ( , ) ( 2 ) ( h h π
Background image of page 2
ECE 3040 - Dr. Alan Doolittle Georgia Tech How do electrons and holes populate the bands? Density of States Concept Thus, the number of states per cubic centimeter between energy E’ and E’+dE is otherwise and and 0 , E E’ if )dE (E’ g , E E’ if )dE (E’ g v v c c
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
ECE 3040 - Dr. Alan Doolittle Georgia Tech How do electrons and holes populate the bands? Probability of Occupation (Fermi Function) Concept
Background image of page 4
Image of page 5
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 11

Lecture4-DensityOfStatesFermiEnergi - Lecture 4 Density of...

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online