The Urbach energy, or Urbach edge, is a parameter typically denoted E 0 {\displaystyle E_{0}} , with dimensions of energy, used to quantify energetic disorder in the band edges of a semiconductor. It is evaluated by fitting the absorption coefficient as a function of energy to an exponential function.
The Urbach energy, or Urbach edge, is a parameter typically denoted E 0 {\displaystyle E_{0}} , with dimensions of energy, used to quantify energetic disorder in the band edges of a semiconductor. It is evaluated by fitting the absorption coefficient as a function of energy to an exponential function.
Source: Wikipedia "Urbach energy" · CC BY-SA 4.0
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