Double Layer or Depletion Region?

  • Thread starter hobbs125
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  • #1
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Main Question or Discussion Point

Hello everyone,

Recently I have been studying double layers. As I have studied I have realized that there seem to be a lot of similarities between a double layer and a depletion region in a PN junction.

The each form electric fields (and thus have a capacitance) and they each limit (or stop) the flow of charge carriers.

So my question is: Are they the same thing? In what ways are they different?
 

Answers and Replies

  • #2
analogdesign
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Double layer of what?
 
  • #3
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A semiconductor and water.
 
  • #4
analogdesign
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I would say no they aren't the same. For one, a depletion region still generates carrier through thermal and generation-combination processes (e.g. optical). These carriers are swept away but they wouldn't be created in water.

Also, a depletion region is a rectifying region because its asymmetric. The water layer wouldn't rectify.
 

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