This CalcTown calculator calculates the reverse current saturation density in a pn junction diode, which is mainly due to the corresponding minority charge carriers in the p side and the n side.

where Lp is related to Dp and the corresponding relaxation time constant

*Implicit are the assumptions that:

1. The contribution of intrinsic charge carriers in total charge concentration is negligible.

2. Wn>>Lp and Wp>>Ln

Intrinsic carrier concentration

Relative permitivitty

Mobility