Depletion Zone (1 Viewer)

[Bank$]

how does recombination (hole and electron canceling) leave behind posistive and negative ions which repel the holes and electrons in a P and N junction. Wont these atoms be neutral ???

Thanks in advance

Justin

 

[helper]

Originally the p and n semiconductors are neutral.

The p-type takes in electrons to fill the holes near the barrier. This means the p is now negative charged.

The n-type is donating electrons so now has less electrons than protons. This makes the n-type positive.

 

[Forbidden.]

Electron holes act as positive charges, they aren't positive charges. Otherwise p-type semiconductors are already neutral when doped.

 

[Bank$]

Originally the p and n semiconductors are neutral

Thank you so much i totaly over looked that.

So the now Negative P type will repel the electrons from the N type and visa versa (is that correct ???)

Also what about the holes in the negative p type, what do they do once the P type becomes negative ???

Justin