Hi, my question is:(adsbygoogle = window.adsbygoogle || []).push({});

Given a linearly graded on-junction with the following doping conditions a=10^21

I have to calculate Emax, Vbi, W and the junction capacitance with Va=0.2V and Vr=-5V

This is for Silicon @ T=300k

----

From what I understand, I have to use an iterative method but I don't think I'm getting the correct answer.

I'm using this equationVbi=Vt*ln((a*Xo)/(ni))^2

Vt=0.0259

ni=1.5x10^10

a=10^21

where Xo= depletion region width

----

Since i'm not given Vbi or Xo, I tried using an iterative method and Vbi and Xo converge at 20.202

I'm not quite sure what to do with this number or which value it pertains to. I would make the assumption that the potential barrier would be around 0.65-0.7V

Can anyone lead me to the right direction? Thanks.

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Linearly graded pn junctions

Can you offer guidance or do you also need help?

Draft saved
Draft deleted

**Physics Forums | Science Articles, Homework Help, Discussion**