Effect of ntype/ptype dose increase on the pn diode breakdown.

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SUMMARY

Increasing the doping level on the p-side of a p-n diode results in a narrower depletion region, which leads to a higher peak electric field for a given reverse voltage. This phenomenon causes the reverse breakdown voltage to decrease. The discussion highlights the relationship between doping concentration and breakdown mechanisms, specifically Zener and Avalanche breakdowns, providing a clear explanation of the underlying physics.

PREREQUISITES
  • Understanding of p-n junctions and their operation
  • Knowledge of semiconductor doping techniques
  • Familiarity with Zener and Avalanche breakdown mechanisms
  • Basic concepts of electric fields in semiconductor materials
NEXT STEPS
  • Research the effects of doping concentration on p-n junction behavior
  • Study Zener and Avalanche breakdown in detail
  • Explore the relationship between depletion region width and electric field strength
  • Investigate practical applications of p-n diodes in electronic circuits
USEFUL FOR

Electrical engineers, semiconductor physicists, and students studying diode behavior and breakdown mechanisms will benefit from this discussion.

iamlovelyboy
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Hello,
I was hoping someone could answer my question.

So i am wondering ..lets say i have a p-n diode. What happens if i increase the dose of the p-side of this junction . What happens to the reverse breakdown of this diode? People say that the reverse breakdown decreases when you increase the dose. Can someone please explain to me why it decreases?

Thank you very much. I searched all over the internet for this answer and i couldn't find it

Tik.
 
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iamlovelyboy said:
Hello,
I was hoping someone could answer my question.

So i am wondering ..lets say i have a p-n diode. What happens if i increase the dose of the p-side of this junction . What happens to the reverse breakdown of this diode? People say that the reverse breakdown decreases when you increase the dose. Can someone please explain to me why it decreases?

Thank you very much. I searched all over the internet for this answer and i couldn't find it

Tik.

The key search terms for the reverse breakdown would be Zener and Avalanche. Using a google search for Zener breakdown versus doping gives you lots of good hits. Here is the 2nd hit:

http://people.seas.harvard.edu/~jones/es154/lectures/lecture_2/breakdown/breakdown.html

.
 
iamlovelyboy said:
Hello,
I was hoping someone could answer my question.

So i am wondering ..lets say i have a p-n diode. What happens if i increase the dose of the p-side of this junction . What happens to the reverse breakdown of this diode? People say that the reverse breakdown decreases when you increase the dose. Can someone please explain to me why it decreases?

Thank you very much. I searched all over the internet for this answer and i couldn't find it

Tik.

Yes that's correct. Increasing the doping level in a pn diode causes the depletion region to become narrower. That is, the reverse voltage is blocked over a smaller distance hence the peak electric field is larger for a given reverse voltage.
 
Thank you very much for your help guys... i think i get it.
 

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