Source: wikibot/moss-burstein-effect

= Moss–Burstein effect
{wiki=Moss–Burstein_effect}

The Moss–Burstein effect is a phenomenon observed in semiconductors and metals, particularly relating to the optical properties of materials. It describes the shift of the absorption edge of a material due to the presence of free carriers (i.e., electrons or holes) in the conduction band. When a semiconductor is doped with impurities that introduce free charge carriers, the energy levels of these carriers can fill up available states in the conduction band.