// multi-utility computation suite · offline · instant · precise
┌──────────────────────────┐
│ [c] calcalyst_ │
│ computation suite │
└──────────────────────────┘
// select a module to initialize
/ search↵ open firstesc close
// adsenseEMPTY_LEADER_SLOT728×90
// adsenseMOBILE_ANCHOR_SLOT320×50
// keyboard_shortcuts
/focus search
↑↓navigate module list
Enter
open first result from search
open highlighted
compute when module is open
compute when focused in a field
Escclose module · clear selection
⌫
sci.semiconductor-band-gap Calculator
Calculates semiconductor bandgap temperature dependence using the Varshni equation: Eg(T) = Eg(0) − αT²/(T+β). Silicon Eg = 1.17 eV at 0 K → 1.12 eV at 300 K — bandgap decreasing with temperature causes solar cell Voc to decrease by ~2.2 mV/°C.
Inputs
Eg Ev
Reference formula or conversion factor shown for context.
Alpha Mev K
Reference formula or conversion factor shown for context.
Beta K
Reference formula or conversion factor shown for context.
T K
Thermal state of the substance. Check whether the formula needs Celsius, Fahrenheit, or Kelvin (K = °C + 273.15).
Results
band gap at T (eV)
The value at the specified point or condition.
wavelength at band edge (nm)
The computed linear length.
Eg(T) = Eg(0) - αT²/(T+β)
Reference formula or conversion factor shown for context.
Eg(300K) reference
Sample size or count used in the calculation.
absorption edge
Sample size or count used in the calculation.
temperature effect
The change in the property attributable to the temperature difference. Many material properties are temperature-dependent.