9.5 Band Theory of Solids
Allowed bands and forbidden gaps formed as atomic levels overlap, and how gap width and band filling divide conductors, insulators, and semiconductors.
5 exercises
9.5 Exercise 1
What are the two main approaches used to determine the energy levels of electrons in a crystal?
9.5 Exercise 3
How does the number of energy levels in a band correspond to the number, N, of atoms.
9.5 Exercise 5
Why are some materials semiconductors?
9.5 Exercise 8
What is the main difference between an insulator and a semiconductor?
9.5 Exercise 10
A valence electron in a crystal absorbs a photon of wavelength, . This is just enough energy to allow the electron to jump from the valence band to the conduction band. What is the size of the energy gap?
Adapted from University Physics Volume 3 © 2016 Rice University. Licensed under CC BY 4.0. Source: University Physics Volume 3. Imported at revision db44eb9.