- #1
Amal Thejus
- 14
- 1
Homework Statement
Its said that there is no Net current in a PN junction under equilibrium as the drift and diffusion currents cancel each other.
We are talking about a Step junction at equilibrium.
Homework Equations
Its just a qualitative analysis.
3. The Attempt at a Solution [/B]
The only way i can think of it is as the Positive charged area in the transient region attracting the electrons in the N region, towards it. Now the particle flow due to diffusion and drift in the N region are in the same direction.
Now the negative charged area in the transient region repells the electrons in P region in effect attracting the holes towards it. So here also the direction of particle flow due to diffusion and drift are in the same direction.