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Diffusion current in a circuit containing semiconductor but no electric source

  1. Nov 3, 2012 #1
    Please I need help to understand how diffusion current can occur in a circuit that contains an N-type or P-type semiconductor without being connected to an electric souce such as a battery.And how can both drift and diffusion current occur when the circuit is connected to a battery?
     
  2. jcsd
  3. Nov 3, 2012 #2

    Bobbywhy

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    Gold Member

  4. Nov 4, 2012 #3
    Diffusion current will be a transient at the time of making of a p-n junction. You wont be able to measure it then.
     
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