PN Junction: Current flow in Reverse Bias

Click For Summary
SUMMARY

The discussion centers on the behavior of current flow in a PN junction diode under reverse bias conditions. It is established that while the depletion region widens with increasing reverse voltage, current can still flow due to avalanche breakdown and Zener breakdown phenomena. These breakdown mechanisms occur when the reverse voltage exceeds a certain threshold, allowing significant current to pass through the diode. The participants reference articles on avalanche breakdown and the Zener effect for further understanding.

PREREQUISITES
  • Understanding of PN junction theory
  • Knowledge of semiconductor physics
  • Familiarity with avalanche breakdown and Zener breakdown mechanisms
  • Basic concepts of diode operation under reverse bias
NEXT STEPS
  • Research "Avalanche breakdown in diodes" for detailed mechanisms
  • Study "Zener diode characteristics and applications" for practical uses
  • Explore "Reverse bias characteristics of PN junctions" for deeper insights
  • Learn about "Diode circuit analysis under reverse bias conditions" for practical applications
USEFUL FOR

Electrical engineers, physics students, and anyone interested in semiconductor device behavior, particularly those studying diode characteristics and applications in electronic circuits.

Prannoy Mehta
Messages
94
Reaction score
2
Can someone explain why after a certain voltage, current flows. We were taught that in pn junction when a reverse voltage is applied the depletion region grows wider. Using this no matter what the voltage current should not increase. So why does a current flow when a reverse current is applied.
 
Physics news on Phys.org
No I have not. I well read it now. Thank you.
 
Thread 'Colors in a plasma globe'
I have a common plasma globe with blue streamers and orange pads at both ends. The orange light is emitted by neon and the blue light is presumably emitted by argon and xenon. Why are the streamers blue while the pads at both ends are orange? A plasma globe's electric field is strong near the central electrode, decreasing with distance, so I would not expect the orange color at both ends.

Similar threads

  • · Replies 4 ·
Replies
4
Views
5K
Replies
3
Views
2K
  • · Replies 2 ·
Replies
2
Views
2K
  • · Replies 12 ·
Replies
12
Views
10K
Replies
1
Views
2K
  • · Replies 7 ·
Replies
7
Views
2K
Replies
3
Views
2K
Replies
1
Views
2K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 10 ·
Replies
10
Views
3K