Does any current flow in reverse PN junction?

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When a diode is reverse biased positive donor ions are left in the N semiconductor and negative acceptor ions in the P type. And since the N is conected to + and its donnor ions has a large +charge, why no electrons from P cannot cross the junction and move to the +of the battery?

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  • #4
CWatters
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There is some reverse current but it's very small because it's the minority carriers involved. For example in the P-type material the majority charge carriers are holes. It's better to think of electrons that are injected from the -ve as reducing the number of holes available making it less conductive, rather than being free electrons able to go across the barrier.

https://en.wikipedia.org/wiki/Reverse_leakage_current
 
  • #5
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There is some reverse current but it's very small because it's the minority carriers involved. For example in the P-type material the majority charge carriers are holes. It's better to think of electrons that are injected from the -ve as reducing the number of holes available making it less conductive, rather than being free electrons able to go across the barrier.

https://en.wikipedia.org/wiki/Reverse_leakage_current
I get it now, thank you for ur answers:-)
 

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