- #1

DeldotB

- 117

- 7

For the diode equation: [tex]I(V)=I_{sat}e^{\frac{Ve}{nKT}}-I_{sat}[/tex]

I also know that the second term in the equation is negligible if: [tex]V> > nV_{T}[/tex]

Vt is thermal voltage

n is ...just a factor related to the quality of the material

I have these initial conditions:

[tex]V> 0.1V\, \, \, ,kT\approx .025 eV\, \, \, n\approx 2[/tex]

Its easy to show that the my inital conditions lead to a V much greater that n*thermal voltage.

My question is: Why is the saturation Current negligible? I know it has something to do with recombination rate but can anyone give me a simple explanation? So many websites just say that the order relation is true but give no evidence as to why.