Semiconductor Diodes (1 Viewer)

[nit]

Just a quick question:

Does the depletion zone of a semiconductor N-P diode tend to grow over time, or does it remain narrow and constant. Also, related to that, is there increasing resistance associated with this system as electrons quench holes, and does it eventually stop in some sort of equilibrium somewhat like batteries?

 

[Xayma]

It doesn't tend to deplete. They are very efficient and seem to have a constant brightness leading me to believe that the depletion zone does not deplete (it is easiest as LED's are visible). I don't think there is an increased resistance. LED's last near forever so they don't reach an equilibrium.

 

[DavidB]

hey there...
sorry i dunt know what you exactly mean by 'depletion zone'??

thanx.

 

[mr EaZy]

when the -ve charges migrate to the p type and holes to the n type, an electric field is set up which doesnt allow any further migration of charges. resistance may change with temperature i think........

 

[DavidB]

yeh ok i sorta get yah...Are you talking about the semicondutor diode sorta like "running out"?
And so i dunt understand wah heat and resistance has to do with it...

could one of u's breifly sumarise wah u's are talkn bout?

thanx