What is the diode equation?

The diode equation describes the current-voltage relationship of a diode, given by the formula ( I = I_s \left( e^{\frac{qV}{kT}} - 1 \right) ). Here, ( I ) is the diode current, ( I_s ) is the reverse saturation current, ( q ) is the charge of an electron, ( V ) is the voltage across the diode, ( k ) is Boltzmann's constant, and ( T ) is the absolute temperature in Kelvin. This equation illustrates how current flows through a diode in response to an applied voltage, highlighting the exponential increase in current with forward bias.