Learning Forum

[Tennywang]

Hi, all

Recently, I have read some articles about PN junction, one of them (data source: Analysis in PN Junction Diode) impressed me deeply and had such doubts What is the concept behind diffusion capacitance and on resistance of the diode? Can we consider diffusion capacitance as a parallel plate capacitor ? It is easier to see the depletion capacitance and its calculation but diffusion capacitance calculation is very confusing ? Does the on resistance comes from carrier scattering?

Analysis in PN Junction Diode.pdf

[kghaffari]

Hi. The CHARGE solver in Lumerical tools provides the simulation means to account for different semiconductor charge dynamics including the depletion and diffusion capacitance. I recommend looking into this article which provides more background on the subject along with an example of pn diode simulation in CHARGE.
Best