Part 2 : Nanostuctures Module 1 : Introduction
Lecture 7 : Exciton
 

Exciton :
In semiconductors, the electron and hole can interact to produce a electron-hole pair bound state, called exciton. The interacting hole and electron can be described by the Hamiltonian

which is the hydrogen atom like problem, where the excitonic Bohr radius is described by

where  is the electron-hole reduced mass given by