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Well I was wondering how we can apply the drude model for diodes.The normal drude model is used on conductors and insulators and since the diode in forward bias is a good conductor(not the best but no the worst)how can we apply the drude model.What I am confused is that the drude model is only for lattices that contain cations and neutral atoms and I find this issue: When an electron starts approaching a negatively charged boron ion it cant collide with it so it losses all of its kinetic energy . If that electron could pass near the boron anion it would repel other electrons and cause electron trafficking . What am I missing?

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  • $\begingroup$ First, I'm not sure just why one would want to bother with a Drude model for a diode, but... Second, one thing you are missing is that there aren't many dopants (one in a million atoms or so), and they just act as another scattering center that will change the $\tau$ in the Drude model just a bit. $\endgroup$ – Jon Custer Apr 8 at 15:13
  • $\begingroup$ The cant act as scattering due to : boron anions and electrons.Both negatively charged repel each other. $\endgroup$ – Altair Apr 8 at 15:59
  • $\begingroup$ Of course they exhibit scattering. Any forces, positive or negative, cause scattering. $\endgroup$ – Jon Custer Apr 8 at 16:02
  • $\begingroup$ They cant collide with each other. $\endgroup$ – Altair Apr 8 at 16:04
  • $\begingroup$ There is still a force. In Rutherford scattering the two particles don't 'collide' with each other either. Or comets in hyperbolic orbits around the sun... $\endgroup$ – Jon Custer Apr 8 at 16:07

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