PN Junction Properties Calculator

Select a semiconductor substrate and a doping profile below.

The depletion layer width, built-in voltage, maximum field, and depletion capacitance will be displayed in the appropriate boxes.

Select a Semiconductor:

Select a doping profile:

Silicon
Gallium Arsenide
Germanium

Abrupt
Linearly-Graded

Input the necessary parameters:

N_A cm^-3

N_D cm^-3

Temperature K

Applied Voltage V

The abrupt junction is one where the doping is constant on both sides of the junction and changes instantly at the junction. These can't really be made, but they are frequently found in students' homework. A subset of the abrupt junction is the one-sided abrupt junction, which can also be calculated here. If you don't know the doping on the heavily-doped side of a one-sided junction, just enter something very large like 1e20.

Maximum Field	kilovolts/cm
Built-in Voltage	volts
Band Gap	eV
Depletion Width	microns
Depletion Capacitance	nanoFarads/cm²