// multi-utility computation suite · offline · instant · precise
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sci.band-gap-temperature Calculator
Calculates the temperature dependence of a semiconductor band gap using the Varshni equation Eg(T) = Eg(0) − αT²/(T+β). Silicon band gap narrows from 1.17 eV at 0 K to 1.12 eV at 300 K — this temperature dependence shifts the absorption edge and affects solar cell efficiency.
Inputs
Eg0 Ev
Reference formula or conversion factor shown for context.
Alpha Ev K
Reference formula or conversion factor shown for context.
Beta K
Reference formula or conversion factor shown for context.
Temperature K
Thermal state of the substance. Check whether the formula needs Celsius, Fahrenheit, or Kelvin (K = °C + 273.15).
Results
band gap Eg at
The value at the specified point or condition.
cutoff wavelength (nm)
The computed linear length.
Eg(0K)
Reference formula or conversion factor shown for context.
Varshni equation
The value at the specified point or condition.
Si at 300K
The value at the specified point or condition.
GaAs
Reference formula or conversion factor shown for context.